Lock stderr in panic handler

Zoxc · Zoxc · commit 82a4beff42c2 · 2024-03-09T01:52:18.000+01:00
diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
@@ -1312,6 +1312,9 @@ pub fn install_ice_hook(
         std::env::set_var("RUST_BACKTRACE", "full");
     }
 
+    // Lock stderr to prevent interleaving of concurrent panics.
+    let _guard = io::stderr().lock();
+
     let using_internal_features = Arc::new(std::sync::atomic::AtomicBool::default());
     let using_internal_features_hook = using_internal_features.clone();
     panic::update_hook(Box::new(

Original file line number	Diff line number	Diff line change
`@@ -1312,6 +1312,9 @@ pub fn install_ice_hook(`
`1312`	`1312`	`std::env::set_var("RUST_BACKTRACE", "full");`
`1313`	`1313`	`}`
`1314`	`1314`
	`1315`	`+ // Lock stderr to prevent interleaving of concurrent panics.`
	`1316`	`+ let _guard = io::stderr().lock();`
	`1317`	`+`
`1315`	`1318`	`let using_internal_features = Arc::new(std::sync::atomic::AtomicBool::default());`
`1316`	`1319`	`let using_internal_features_hook = using_internal_features.clone();`
`1317`	`1320`	`panic::update_hook(Box::new(`