Auto merge of #115787 - Mark-Simulacrum:stable-next, r=Mark-Simulacrum 1.72.1

[stable] 1.72.1 release

This backports:

*  Remove assert that checks type equality #115215
*  implied bounds: do not ICE on unconstrained region vars #115559
*  rustdoc: correctly deal with self ty params when eliding default object lifetimes #115276
*  Stop emitting non-power-of-two vectors in (non-portable-SIMD) codegen #115236
*  Normalize before checking if local is freeze in deduced_param_attrs #114948

Some cherry-picks required merge conflict resolution, we'll see if I got it right based on CI (rustdoc fix and LLVM codegen test).

r? `@Mark-Simulacrum`

1 files changed, 6 insertions, 1 deletions

diff --git a/compiler/rustc_mir_transform/src/deduce_param_attrs.rs b/compiler/rustc_mir_transform/src/deduce_param_attrs.rs
index a133c9d4782..e782c037376 100644
--- a/compiler/rustc_mir_transform/src/deduce_param_attrs.rs
+++ b/compiler/rustc_mir_transform/src/deduce_param_attrs.rs
@@ -203,7 +203,12 @@ pub fn deduced_param_attrs<'tcx>(
         body.local_decls.iter().skip(1).take(body.arg_count).enumerate().map(
             |(arg_index, local_decl)| DeducedParamAttrs {
                 read_only: !deduce_read_only.mutable_args.contains(arg_index)
-                    && local_decl.ty.is_freeze(tcx, param_env),
+                    // We must normalize here to reveal opaques and normalize
+                    // their substs, otherwise we'll see exponential blow-up in
+                    // compile times: #113372
+                    && tcx
+                        .normalize_erasing_regions(param_env, local_decl.ty)
+                        .is_freeze(tcx, param_env),
             },
         ),
     );