Auto merge of #105997 - RalfJung:immediate-abort, r=eholk

abort immediately on bad mem::zeroed/uninit

Now that we have non-unwinding panics, let's use them for these assertions. This re-establishes the property that `mem::uninitialized` and `mem::zeroed` will never unwind -- the earlier approach of causing panics here sometimes led to hard-to-debug segfaults when the surrounding code was not able to cope with the unexpected unwinding.

Cc `@bjorn3` I did not touch cranelift but I assume it needs a similar patch. However it has a `codegen_panic` abstraction that I did not want to touch since I didn't know how else it is used.

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs
index deeeb9af4eb..59cc500a99d 100644
--- a/compiler/rustc_monomorphize/src/collector.rs
+++ b/compiler/rustc_monomorphize/src/collector.rs
@@ -843,7 +843,7 @@ impl<'a, 'tcx> MirVisitor<'tcx> for MirNeighborCollector<'a, 'tcx> {
             mir::TerminatorKind::Abort { .. } => {
                 let instance = Instance::mono(
                     tcx,
-                    tcx.require_lang_item(LangItem::PanicNoUnwind, Some(source)),
+                    tcx.require_lang_item(LangItem::PanicCannotUnwind, Some(source)),
                 );
                 if should_codegen_locally(tcx, &instance) {
                     self.output.push(create_fn_mono_item(tcx, instance, source));