error: function pointer types may not have generic parameters
 --> recover-fn-ptr-with-generics.rs:2:21
  |
2 |     let _: extern fn<'a: 'static>();
  |                     ^^^^^^^^^^^^^
  |
help: consider moving the lifetime parameter to a `for` parameter list
  |
2 -     let _: extern fn<'a: 'static>();
2 +     let _: for<'a> extern fn();
  |

error: lifetime bounds cannot be used in this context
 --> recover-fn-ptr-with-generics.rs:2:26
  |
2 |     let _: extern fn<'a: 'static>();
  |                          ^^^^^^^

thread 'rustc' panicked at 'Span must not be empty and have no suggestion', /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:710:9
stack backtrace:
   0:     0x7fa181f6fb24 - std::backtrace_rs::backtrace::libunwind::trace::h1544161bb283d831
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fa181f6fb24 - std::backtrace_rs::backtrace::trace_unsynchronized::h88182f9ae043ea1d
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fa181f6fb24 - std::sys_common::backtrace::_print_fmt::hbc46e181236b160e
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7fa181f6fb24 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h40f9d84c979d1c60
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fa181fddd28 - core::fmt::write::h3693e9c93ce31d95
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1232:17
   5:     0x7fa181f5284f - std::io::Write::write_fmt::hf505aa7ad9258ee9
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1684:15
   6:     0x7fa181f6f925 - std::sys_common::backtrace::_print::h7f7e9448ce377511
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7fa181f6f925 - std::sys_common::backtrace::print::h10d8939f3c4a7090
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7fa181f378e7 - std::panicking::default_hook::{{closure}}::hd96f1491f179fb0a
   9:     0x7fa181f375a1 - std::panicking::default_hook::hea690dedd054fe31
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:286:9
  10:     0x7fa184a78045 - <alloc[a96d60a9bf8c9b93]::boxed::Box<dyn for<'a, 'b> core[3a7799eb5b53fe42]::ops::function::Fn<(&'a core[3a7799eb5b53fe42]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[3a7799eb5b53fe42]::marker::Sync + core[3a7799eb5b53fe42]::marker::Send> as core[3a7799eb5b53fe42]::ops::function::Fn<(&core[3a7799eb5b53fe42]::panic::panic_info::PanicInfo,)>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2002:9
  11:     0x7fa184a78045 - rustc_driver_impl[c7adae1617edfc64]::DEFAULT_HOOK::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1145:17
  12:     0x7fa181f382e4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hac989f8c5fbcacd1
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2002:9
  13:     0x7fa181f382e4 - std::panicking::rust_panic_with_hook::hc778308fe861818c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:692:13
  14:     0x7fa181f70112 - std::panicking::begin_panic_handler::{{closure}}::h18e0a9e49a0d5c86
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:577:13
  15:     0x7fa181f6fc06 - std::sys_common::backtrace::__rust_end_short_backtrace::h3cd1987cc33c3094
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:137:18
  16:     0x7fa181f37de2 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:575:5
  17:     0x7fa181fe7f43 - core::panicking::panic_fmt::ha9472d71642ed08e
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:64:14
  18:     0x7fa1855fa795 - <rustc_errors[e2c6533d414d421d]::diagnostic::Diagnostic>::span_suggestion_with_style::<&str, &str>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:710:9
  19:     0x7fa1856139e9 - <rustc_errors[e2c6533d414d421d]::diagnostic::Diagnostic>::span_suggestion::<&str, &str>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:691:9
  20:     0x7fa1856139e9 - <rustc_errors[e2c6533d414d421d]::diagnostic_builder::DiagnosticBuilder<()>>::span_suggestion::<&str, &str>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic_builder.rs:481:13
  21:     0x7fa1856139e9 - <rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup_with_diagnostics::<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/context.rs:862:25
  22:     0x7fa1856139e9 - <<rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup_with_diagnostics<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id::{closure#0}>::{closure#0} as core[3a7799eb5b53fe42]::ops::function::FnOnce<(&mut rustc_errors[e2c6533d414d421d]::diagnostic_builder::DiagnosticBuilder<()>,)>>::call_once::{shim:vtable#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  23:     0x7fa185603bce - <alloc[a96d60a9bf8c9b93]::boxed::Box<dyn for<'a, 'b> core[3a7799eb5b53fe42]::ops::function::FnOnce<(&'a mut rustc_errors[e2c6533d414d421d]::diagnostic_builder::DiagnosticBuilder<'b, ()>,), Output = &'a mut rustc_errors[e2c6533d414d421d]::diagnostic_builder::DiagnosticBuilder<'b, ()>>> as core[3a7799eb5b53fe42]::ops::function::FnOnce<(&mut rustc_errors[e2c6533d414d421d]::diagnostic_builder::DiagnosticBuilder<()>,)>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1988:9
  24:     0x7fa185603bce - rustc_middle[d07bed17621820c2]::lint::struct_lint_level::struct_lint_level_impl::<rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/lint.rs:457:9
  25:     0x7fa1855fdcbe - rustc_middle[d07bed17621820c2]::lint::struct_lint_level::<rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup_with_diagnostics<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/lint.rs:461:5
  26:     0x7fa1855fdcbe - <rustc_lint[f4ebd82b9a882195]::levels::LintLevelsBuilder<rustc_lint[f4ebd82b9a882195]::levels::TopDown>>::struct_lint::<rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup_with_diagnostics<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/levels.rs:1019:9
  27:     0x7fa1856c1c7d - <rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup::<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup_with_diagnostics<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/context.rs:1076:9
  28:     0x7fa1856c1c7d - <rustc_lint[f4ebd82b9a882195]::context::EarlyContext as rustc_lint[f4ebd82b9a882195]::context::LintContext>::lookup_with_diagnostics::<rustc_error_messages[861d1e2af985c35b]::MultiSpan, rustc_error_messages[861d1e2af985c35b]::DiagnosticMessage, <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/context.rs:601:9
  29:     0x7fa1856c1c7d - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::inlined_check_id
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:47:13
  30:     0x7fa1856c1c7d - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_generic_param::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:73:14
  31:     0x7fa1856c1c7d - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_generic_param
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:239:9
  32:     0x7fa18571ceac - rustc_ast[1f173e78387ce3f]::visit::walk_ty::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:410:13
  33:     0x7fa18571595c - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_ty
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:193:9
  34:     0x7fa18571595c - rustc_ast[1f173e78387ce3f]::visit::walk_local::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:275:5
  35:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:203:13
  36:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:36
  37:     0x7fa1856bcc12 - stacker[12027ce31fbb92f0]::maybe_grow::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  38:     0x7fa1856bcc12 - rustc_data_structures[de9c3b5be789562e]::stack::ensure_sufficient_stack::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  39:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:9
  40:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:201:9
  41:     0x7fa1856bc42b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_stmt
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:153:9
  42:     0x7fa1856bc63c - rustc_ast[1f173e78387ce3f]::visit::walk_block::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:709:5
  43:     0x7fa1856bc63c - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_block
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:210:9
  44:     0x7fa185721d19 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_fn
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:159:9
  45:     0x7fa185721d19 - rustc_ast[1f173e78387ce3f]::visit::walk_item::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:315:13
  46:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:94:13
  47:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:36
  48:     0x7fa1856bb77b - stacker[12027ce31fbb92f0]::maybe_grow::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  49:     0x7fa1856bb77b - rustc_data_structures[de9c3b5be789562e]::stack::ensure_sufficient_stack::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  50:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:9
  51:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:92:9
  52:     0x7fa18571525c - rustc_ast[1f173e78387ce3f]::visit::walk_crate::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:266:5
  53:     0x7fa1856abeb2 - <&rustc_ast[1f173e78387ce3f]::ast::Crate as rustc_lint[f4ebd82b9a882195]::early::EarlyCheckNode>::check::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:359:9
  54:     0x7fa1856abeb2 - rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:423:66
  55:     0x7fa1856abeb2 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:36
  56:     0x7fa1856abeb2 - stacker[12027ce31fbb92f0]::maybe_grow::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  57:     0x7fa1856abeb2 - rustc_data_structures[de9c3b5be789562e]::stack::ensure_sufficient_stack::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  58:     0x7fa1856abeb2 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:9
  59:     0x7fa1856abeb2 - rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:423:5
  60:     0x7fa1856abeb2 - rustc_lint[f4ebd82b9a882195]::early::check_ast_node::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:406:9
  61:     0x7fa185671fbd - rustc_interface[22044caa1f29908d]::passes::configure_and_expand::{closure#8}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/passes.rs:357:9
  62:     0x7fa185671fbd - <rustc_data_structures[de9c3b5be789562e]::profiling::VerboseTimingGuard>::run::<(), rustc_interface[22044caa1f29908d]::passes::configure_and_expand::{closure#8}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/profiling.rs:723:9
  63:     0x7fa185671fbd - <rustc_session[ec4229a09ed780b3]::session::Session>::time::<(), rustc_interface[22044caa1f29908d]::passes::configure_and_expand::{closure#8}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_session/src/utils.rs:10:50
  64:     0x7fa1856570e5 - rustc_interface[22044caa1f29908d]::passes::configure_and_expand
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/passes.rs:355:5
  65:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:202:29
  66:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute::<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:43:41
  67:     0x7fa185713035 - <core[3a7799eb5b53fe42]::option::Option<core[3a7799eb5b53fe42]::result::Result<rustc_data_structures[de9c3b5be789562e]::steal::Steal<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>, rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>>::get_or_insert_with::<<rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/option.rs:1593:49
  68:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute::<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:43:17
  69:     0x7fa185713035 - <core[3a7799eb5b53fe42]::cell::RefMut<core[3a7799eb5b53fe42]::option::Option<core[3a7799eb5b53fe42]::result::Result<rustc_data_structures[de9c3b5be789562e]::steal::Steal<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>, rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>>>::filter_map::<rustc_data_structures[de9c3b5be789562e]::steal::Steal<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>, <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/cell.rs:1588:15
  70:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute::<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:40:9
  71:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:187:9
  72:     0x7fa184afdbd8 - rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}::{closure#2}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:323:13
  73:     0x7fa184afdbd8 - <rustc_interface[22044caa1f29908d]::interface::Compiler>::enter::<rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}::{closure#2}, core[3a7799eb5b53fe42]::result::Result<core[3a7799eb5b53fe42]::option::Option<rustc_interface[22044caa1f29908d]::queries::Linker>, rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:383:19
  74:     0x7fa184a792b5 - rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:285:22
  75:     0x7fa184a792b5 - rustc_interface[22044caa1f29908d]::interface::run_compiler::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/interface.rs:299:21
  76:     0x7fa184a792b5 - rustc_span[82580b446b48c745]::with_source_map::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_span/src/lib.rs:1026:5
  77:     0x7fa184a96269 - rustc_interface[22044caa1f29908d]::interface::run_compiler::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/interface.rs:293:13
  78:     0x7fa184a96269 - <scoped_tls[3e8267cb6b5069b8]::ScopedKey<rustc_span[82580b446b48c745]::SessionGlobals>>::set::<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137:9
  79:     0x7fa184a9405f - rustc_span[82580b446b48c745]::create_session_globals_then::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_span/src/lib.rs:111:5
  80:     0x7fa184a9405f - rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals::<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/util.rs:147:38
  81:     0x7fa184a9405f - std[6ee66c0b76df7c3f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:121:18
  82:     0x7fa184a8a8d3 - <std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_::<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:560:17
  83:     0x7fa184a8a8d3 - <core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core[3a7799eb5b53fe42]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panic/unwind_safe.rs:271:9
  84:     0x7fa184a8a8d3 - std[6ee66c0b76df7c3f]::panicking::try::do_call::<core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:483:40
  85:     0x7fa184a8a8d3 - std[6ee66c0b76df7c3f]::panicking::try::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:447:19
  86:     0x7fa184a8a8d3 - std[6ee66c0b76df7c3f]::panic::catch_unwind::<core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panic.rs:140:14
  87:     0x7fa184a8a8d3 - <std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_::<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:559:30
  88:     0x7fa184a8a8d3 - <<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1} as core[3a7799eb5b53fe42]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  89:     0x7fa181f35138 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he94f0d2c6fa2933f
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1988:9
  90:     0x7fa181f35138 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h81138e0c6d830c03
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1988:9
  91:     0x7fa181f14825 - std::sys::unix::thread::Thread::new::thread_start::h439d4072ac7c5e1c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys/unix/thread.rs:108:17
  92:     0x7fa18209ebb5 - <unknown>
  93:     0x7fa182120d90 - <unknown>
  94:                0x0 - <unknown>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.69.0-dev running on x86_64-unknown-linux-gnu

query stack during panic:
end of query stack
thread 'rustc' panicked at 'Found a `push` without a `pop`.', compiler/rustc_lint/src/levels.rs:509:9
stack backtrace:
   0:     0x7fa181f6fb24 - std::backtrace_rs::backtrace::libunwind::trace::h1544161bb283d831
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fa181f6fb24 - std::backtrace_rs::backtrace::trace_unsynchronized::h88182f9ae043ea1d
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fa181f6fb24 - std::sys_common::backtrace::_print_fmt::hbc46e181236b160e
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7fa181f6fb24 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h40f9d84c979d1c60
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fa181fddd28 - core::fmt::write::h3693e9c93ce31d95
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1232:17
   5:     0x7fa181f5284f - std::io::Write::write_fmt::hf505aa7ad9258ee9
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1684:15
   6:     0x7fa181f6f925 - std::sys_common::backtrace::_print::h7f7e9448ce377511
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7fa181f6f925 - std::sys_common::backtrace::print::h10d8939f3c4a7090
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7fa181f378e7 - std::panicking::default_hook::{{closure}}::hd96f1491f179fb0a
   9:     0x7fa181f375a1 - std::panicking::default_hook::hea690dedd054fe31
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:286:9
  10:     0x7fa184a78045 - <alloc[a96d60a9bf8c9b93]::boxed::Box<dyn for<'a, 'b> core[3a7799eb5b53fe42]::ops::function::Fn<(&'a core[3a7799eb5b53fe42]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[3a7799eb5b53fe42]::marker::Sync + core[3a7799eb5b53fe42]::marker::Send> as core[3a7799eb5b53fe42]::ops::function::Fn<(&core[3a7799eb5b53fe42]::panic::panic_info::PanicInfo,)>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2002:9
  11:     0x7fa184a78045 - rustc_driver_impl[c7adae1617edfc64]::DEFAULT_HOOK::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1145:17
  12:     0x7fa181f382e4 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hac989f8c5fbcacd1
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2002:9
  13:     0x7fa181f382e4 - std::panicking::rust_panic_with_hook::hc778308fe861818c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:692:13
  14:     0x7fa181f70112 - std::panicking::begin_panic_handler::{{closure}}::h18e0a9e49a0d5c86
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:577:13
  15:     0x7fa181f6fc06 - std::sys_common::backtrace::__rust_end_short_backtrace::h3cd1987cc33c3094
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:137:18
  16:     0x7fa181f37de2 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:575:5
  17:     0x7fa181fe7f43 - core::panicking::panic_fmt::ha9472d71642ed08e
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:64:14
  18:     0x7fa185811a39 - <rustc_lint[f4ebd82b9a882195]::levels::BuilderPush as core[3a7799eb5b53fe42]::ops::drop::Drop>::drop
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/levels.rs:509:9
  19:     0x7fa1856ab397 - core[3a7799eb5b53fe42]::ptr::drop_in_place::<rustc_lint[f4ebd82b9a882195]::levels::BuilderPush>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ptr/mod.rs:490:1
  20:     0x7fa1856c22b2 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_generic_param::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:80:5
  21:     0x7fa1856c22b2 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_generic_param
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:239:9
  22:     0x7fa18571ceac - rustc_ast[1f173e78387ce3f]::visit::walk_ty::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:410:13
  23:     0x7fa18571595c - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_ty
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:193:9
  24:     0x7fa18571595c - rustc_ast[1f173e78387ce3f]::visit::walk_local::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:275:5
  25:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:203:13
  26:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:36
  27:     0x7fa1856bcc12 - stacker[12027ce31fbb92f0]::maybe_grow::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  28:     0x7fa1856bcc12 - rustc_data_structures[de9c3b5be789562e]::stack::ensure_sufficient_stack::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  29:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:9
  30:     0x7fa1856bcc12 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_local
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:201:9
  31:     0x7fa1856bc42b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_stmt
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:153:9
  32:     0x7fa1856bc63c - rustc_ast[1f173e78387ce3f]::visit::walk_block::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:709:5
  33:     0x7fa1856bc63c - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_block
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:210:9
  34:     0x7fa185721d19 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_fn
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:159:9
  35:     0x7fa185721d19 - rustc_ast[1f173e78387ce3f]::visit::walk_item::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:315:13
  36:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:94:13
  37:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:36
  38:     0x7fa1856bb77b - stacker[12027ce31fbb92f0]::maybe_grow::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  39:     0x7fa1856bb77b - rustc_data_structures[de9c3b5be789562e]::stack::ensure_sufficient_stack::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  40:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:9
  41:     0x7fa1856bb77b - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass> as rustc_ast[1f173e78387ce3f]::visit::Visitor>::visit_item
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:92:9
  42:     0x7fa18571525c - rustc_ast[1f173e78387ce3f]::visit::walk_crate::<rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_ast/src/visit.rs:266:5
  43:     0x7fa1856abeb2 - <&rustc_ast[1f173e78387ce3f]::ast::Crate as rustc_lint[f4ebd82b9a882195]::early::EarlyCheckNode>::check::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:359:9
  44:     0x7fa1856abeb2 - rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:423:66
  45:     0x7fa1856abeb2 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:36
  46:     0x7fa1856abeb2 - stacker[12027ce31fbb92f0]::maybe_grow::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  47:     0x7fa1856abeb2 - rustc_data_structures[de9c3b5be789562e]::stack::ensure_sufficient_stack::<(), <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  48:     0x7fa1856abeb2 - <rustc_lint[f4ebd82b9a882195]::early::EarlyContextAndPass<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass>>::with_lint_attrs::<rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:76:9
  49:     0x7fa1856abeb2 - rustc_lint[f4ebd82b9a882195]::early::check_ast_node_inner::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:423:5
  50:     0x7fa1856abeb2 - rustc_lint[f4ebd82b9a882195]::early::check_ast_node::<rustc_lint[f4ebd82b9a882195]::BuiltinCombinedEarlyLintPass, &rustc_ast[1f173e78387ce3f]::ast::Crate>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_lint/src/early.rs:406:9
  51:     0x7fa185671fbd - rustc_interface[22044caa1f29908d]::passes::configure_and_expand::{closure#8}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/passes.rs:357:9
  52:     0x7fa185671fbd - <rustc_data_structures[de9c3b5be789562e]::profiling::VerboseTimingGuard>::run::<(), rustc_interface[22044caa1f29908d]::passes::configure_and_expand::{closure#8}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/profiling.rs:723:9
  53:     0x7fa185671fbd - <rustc_session[ec4229a09ed780b3]::session::Session>::time::<(), rustc_interface[22044caa1f29908d]::passes::configure_and_expand::{closure#8}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_session/src/utils.rs:10:50
  54:     0x7fa1856570e5 - rustc_interface[22044caa1f29908d]::passes::configure_and_expand
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/passes.rs:355:5
  55:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:202:29
  56:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute::<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:43:41
  57:     0x7fa185713035 - <core[3a7799eb5b53fe42]::option::Option<core[3a7799eb5b53fe42]::result::Result<rustc_data_structures[de9c3b5be789562e]::steal::Steal<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>, rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>>::get_or_insert_with::<<rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/option.rs:1593:49
  58:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute::<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:43:17
  59:     0x7fa185713035 - <core[3a7799eb5b53fe42]::cell::RefMut<core[3a7799eb5b53fe42]::option::Option<core[3a7799eb5b53fe42]::result::Result<rustc_data_structures[de9c3b5be789562e]::steal::Steal<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>, rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>>>::filter_map::<rustc_data_structures[de9c3b5be789562e]::steal::Steal<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>, <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/cell.rs:1588:15
  60:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Query<&rustc_middle[d07bed17621820c2]::ty::context::GlobalCtxt>>::compute::<<rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:40:9
  61:     0x7fa185713035 - <rustc_interface[22044caa1f29908d]::queries::Queries>::global_ctxt
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:187:9
  62:     0x7fa184afdbd8 - rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}::{closure#2}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:323:13
  63:     0x7fa184afdbd8 - <rustc_interface[22044caa1f29908d]::interface::Compiler>::enter::<rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}::{closure#2}, core[3a7799eb5b53fe42]::result::Result<core[3a7799eb5b53fe42]::option::Option<rustc_interface[22044caa1f29908d]::queries::Linker>, rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/queries.rs:383:19
  64:     0x7fa184a792b5 - rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:285:22
  65:     0x7fa184a792b5 - rustc_interface[22044caa1f29908d]::interface::run_compiler::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/interface.rs:299:21
  66:     0x7fa184a792b5 - rustc_span[82580b446b48c745]::with_source_map::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_span/src/lib.rs:1026:5
  67:     0x7fa184a96269 - rustc_interface[22044caa1f29908d]::interface::run_compiler::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/interface.rs:293:13
  68:     0x7fa184a96269 - <scoped_tls[3e8267cb6b5069b8]::ScopedKey<rustc_span[82580b446b48c745]::SessionGlobals>>::set::<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/.cargo/registry/src/github.com-1ecc6299db9ec823/scoped-tls-1.0.0/src/lib.rs:137:9
  69:     0x7fa184a9405f - rustc_span[82580b446b48c745]::create_session_globals_then::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_span/src/lib.rs:111:5
  70:     0x7fa184a9405f - rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals::<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/util.rs:147:38
  71:     0x7fa184a9405f - std[6ee66c0b76df7c3f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:121:18
  72:     0x7fa184a8a8d3 - <std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_::<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:560:17
  73:     0x7fa184a8a8d3 - <core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core[3a7799eb5b53fe42]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panic/unwind_safe.rs:271:9
  74:     0x7fa184a8a8d3 - std[6ee66c0b76df7c3f]::panicking::try::do_call::<core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:483:40
  75:     0x7fa184a8a8d3 - std[6ee66c0b76df7c3f]::panicking::try::<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:447:19
  76:     0x7fa184a8a8d3 - std[6ee66c0b76df7c3f]::panic::catch_unwind::<core[3a7799eb5b53fe42]::panic::unwind_safe::AssertUnwindSafe<<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panic.rs:140:14
  77:     0x7fa184a8a8d3 - <std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_::<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/mod.rs:559:30
  78:     0x7fa184a8a8d3 - <<std[6ee66c0b76df7c3f]::thread::Builder>::spawn_unchecked_<rustc_interface[22044caa1f29908d]::util::run_in_thread_pool_with_globals<rustc_interface[22044caa1f29908d]::interface::run_compiler<core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>, rustc_driver_impl[c7adae1617edfc64]::run_compiler::{closure#1}>::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[3a7799eb5b53fe42]::result::Result<(), rustc_errors[e2c6533d414d421d]::ErrorGuaranteed>>::{closure#1} as core[3a7799eb5b53fe42]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  79:     0x7fa181f35138 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::he94f0d2c6fa2933f
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1988:9
  80:     0x7fa181f35138 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h81138e0c6d830c03
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1988:9
  81:     0x7fa181f14825 - std::sys::unix::thread::Thread::new::thread_start::h439d4072ac7c5e1c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys/unix/thread.rs:108:17
  82:     0x7fa18209ebb5 - <unknown>
  83:     0x7fa182120d90 - <unknown>
  84:                0x0 - <unknown>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.69.0-dev running on x86_64-unknown-linux-gnu

query stack during panic:
end of query stack
thread panicked while panicking. aborting.
[2]    269480 IOT instruction  ~/.rustup/toolchains/local-debug-assertions/bin/rustc  -Wunused-lifetimes