Rollup merge of rust-lang#141214 - RalfJung:miri-sync, r=RalfJung

Miri subtree update

r? `@ghost`

Fixes rust-lang/miri#4328

Author: fmease

src/tools/miri/cargo-miri/src/phases.rs

@@ -176,8 +176,11 @@ pub fn phase_cargo_miri(mut args: impl Iterator<Item = String>) {
     // Set `--target-dir` to `miri` inside the original target directory.
     let target_dir = get_target_dir(&metadata);
     cmd.arg("--target-dir").arg(target_dir);
-    // Enable cross-target doctests (for consistency between different cargo versions).
-    cmd.arg("-Zdoctest-xcompile");
+    // Only when running in x.py (where we are running with beta cargo): set `RUSTC_STAGE`.
+    // Will have to be removed on next bootstrap bump. tag: cfg(bootstrap).
+    if env::var_os("RUSTC_STAGE").is_some() {
+        cmd.arg("-Zdoctest-xcompile");
+    }
 
     // *After* we set all the flags that need setting, forward everything else. Make sure to skip
     // `--target-dir` (which would otherwise be set twice).

src/tools/miri/rust-version

@@ -1 +1 @@
-a69bc17fb8026bdc0d24bb1896ff95f0eba1da4e
+ac17c3486c6fdfbb0c3c18b99f3d8dfbff625d29

src/tools/miri/src/helpers.rs

@@ -933,7 +933,11 @@ pub trait EvalContextExt<'tcx>: crate::MiriInterpCxExt<'tcx> {
     }
 
     /// Check that the calling convention is what we expect.
-    fn check_callconv<'a>(&self, fn_abi: &FnAbi<'tcx, Ty<'tcx>>, exp_abi: Conv) -> InterpResult<'a, ()> {
+    fn check_callconv<'a>(
+        &self,
+        fn_abi: &FnAbi<'tcx, Ty<'tcx>>,
+        exp_abi: Conv,
+    ) -> InterpResult<'a, ()> {
         if fn_abi.conv != exp_abi {
             throw_ub_format!(
                 "calling a function with calling convention {exp_abi} using caller calling convention {}",