miri: fix ICE when running out of address space

[rust.git] / compiler / rustc_const_eval / src / interpret / intrinsics / caller_location.rs

diff --git a/compiler/rustc_const_eval/src/interpret/intrinsics/caller_location.rs b/compiler/rustc_const_eval/src/interpret/intrinsics/caller_location.rs
index 77c7b4bacb8c8a96d68b42704478166e754d0772..5042c6bac9932dcfd4821aa3e273c14fab373b7d 100644 (file)
--- a/compiler/rustc_const_eval/src/interpret/intrinsics/caller_location.rs
+++ b/compiler/rustc_const_eval/src/interpret/intrinsics/caller_location.rs
@@ -78,13 +78,16 @@ pub(crate) fn alloc_caller_location(
         col: u32,
     ) -> MPlaceTy<'tcx, M::Provenance> {
         let loc_details = &self.tcx.sess.opts.unstable_opts.location_detail;
+        // This can fail if rustc runs out of memory right here. Trying to emit an error would be
+        // pointless, since that would require allocating more memory than these short strings.
         let file = if loc_details.file {
             self.allocate_str(filename.as_str(), MemoryKind::CallerLocation, Mutability::Not)
+                .unwrap()
         } else {
             // FIXME: This creates a new allocation each time. It might be preferable to
             // perform this allocation only once, and re-use the `MPlaceTy`.
             // See https://github.com/rust-lang/rust/pull/89920#discussion_r730012398
-            self.allocate_str("<redacted>", MemoryKind::CallerLocation, Mutability::Not)
+            self.allocate_str("<redacted>", MemoryKind::CallerLocation, Mutability::Not).unwrap()
         };
         let line = if loc_details.line { Scalar::from_u32(line) } else { Scalar::from_u32(0) };
         let col = if loc_details.column { Scalar::from_u32(col) } else { Scalar::from_u32(0) };
@@ -95,8 +98,6 @@ pub(crate) fn alloc_caller_location(
             .bound_type_of(self.tcx.require_lang_item(LangItem::PanicLocation, None))
             .subst(*self.tcx, self.tcx.mk_substs([self.tcx.lifetimes.re_erased.into()].iter()));
         let loc_layout = self.layout_of(loc_ty).unwrap();
-        // This can fail if rustc runs out of memory right here. Trying to emit an error would be
-        // pointless, since that would require allocating more memory than a Location.
         let location = self.allocate(loc_layout, MemoryKind::CallerLocation).unwrap();
 
         // Initialize fields.