Auto merge of #95056 - Dylan-DPC:rollup-swtuw2n, r=Dylan-DPC

Rollup of 10 pull requests

Successful merges:

 - #91133 (Improve `unsafe` diagnostic)
 - #93222 (Make ErrorReported impossible to construct outside `rustc_errors`)
 - #93745 (Stabilize ADX target feature)
 - #94309 ([generator_interior] Be more precise with scopes of borrowed places)
 - #94698 (Remove redundant code from copy-suggestions)
 - #94731 (Suggest adding `{ .. }` around a const function call with arguments)
 - #94960 (Fix many spelling mistakes)
 - #94982 (Add deprecated_safe feature gate and attribute, cc #94978)
 - #94997 (debuginfo: Fix ICE when generating name for type that produces a layout error.)
 - #95000 (Fixed wrong type name in comment)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 23 insertions, 2 deletions

diff --git a/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs b/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
index f39f260225e..ffc8f55bc0c 100644
--- a/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
+++ b/compiler/rustc_codegen_ssa/src/debuginfo/type_names.rs
@@ -74,9 +74,30 @@ fn push_debuginfo_type_name<'tcx>(
         ty::Float(float_ty) => output.push_str(float_ty.name_str()),
         ty::Foreign(def_id) => push_item_name(tcx, def_id, qualified, output),
         ty::Adt(def, substs) => {
-            let ty_and_layout = tcx.layout_of(ParamEnv::reveal_all().and(t)).expect("layout error");
+            // `layout_for_cpp_like_fallback` will be `Some` if we want to use the fallback encoding.
+            let layout_for_cpp_like_fallback = if cpp_like_debuginfo && def.is_enum() {
+                match tcx.layout_of(ParamEnv::reveal_all().and(t)) {
+                    Ok(layout) => {
+                        if !wants_c_like_enum_debuginfo(layout) {
+                            Some(layout)
+                        } else {
+                            // This is a C-like enum so we don't want to use the fallback encoding
+                            // for the name.
+                            None
+                        }
+                    }
+                    Err(e) => {
+                        // Computing the layout can still fail here, e.g. if the target architecture
+                        // cannot represent the type. See https://github.com/rust-lang/rust/issues/94961.
+                        tcx.sess.fatal(&format!("{}", e));
+                    }
+                }
+            } else {
+                // We are not emitting cpp-like debuginfo or this isn't even an enum.
+                None
+            };
 
-            if def.is_enum() && cpp_like_debuginfo && !wants_c_like_enum_debuginfo(ty_and_layout) {
+            if let Some(ty_and_layout) = layout_for_cpp_like_fallback {
                 msvc_enum_fallback(
                     tcx,
                     ty_and_layout,