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Add feature to disable the panic_impl provided by std #100156

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Add feature to disable the panic_impl provided by std #100156

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3 changes: 3 additions & 0 deletions library/std/Cargo.toml
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Expand Up @@ -68,6 +68,9 @@ system-llvm-libunwind = ["unwind/system-llvm-libunwind"]
# Make panics and failed asserts immediately abort without formatting any message
panic_immediate_abort = ["core/panic_immediate_abort"]

# Disables the `panic_impl` lang item
no_panic_impl = []

# Enable std_detect default features for stdarch/crates/std_detect:
# https://github.com/rust-lang/stdarch/blob/master/crates/std_detect/Cargo.toml
std_detect_file_io = ["std_detect/std_detect_file_io"]
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2 changes: 1 addition & 1 deletion library/std/src/panicking.rs
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Expand Up @@ -528,7 +528,7 @@ pub fn panicking() -> bool {

/// Entry point of panics from the libcore crate (`panic_impl` lang item).
#[cfg(not(test))]
#[panic_handler]
#[cfg_attr(not(feature = "no_panic_impl"), panic_handler)]
pub fn begin_panic_handler(info: &PanicInfo<'_>) -> ! {
struct PanicPayload<'a> {
inner: &'a fmt::Arguments<'a>,
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