Auto merge of #105531 - matthiaskrgr:rollup-7y7zbgl, r=matthiaskrgr

Rollup of 6 pull requests

Successful merges:

 - #104460 (Migrate parts of `rustc_expand` to session diagnostics)
 - #105192 (Point at LHS on binop type err if relevant)
 - #105234 (Remove unneeded field from `SwitchTargets`)
 - #105239 (Avoid heap allocation when truncating thread names)
 - #105410 (Consider `parent_count` for const param defaults)
 - #105482 (Fix invalid codegen during debuginfo lowering)

Failed merges:

 - #105411 (Introduce `with_forced_trimmed_paths`)

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

2 files changed, 3 insertions, 13 deletions

diff --git a/compiler/rustc_const_eval/src/interpret/terminator.rs b/compiler/rustc_const_eval/src/interpret/terminator.rs
index 57e40e168fa..0e7ffcdffc9 100644
--- a/compiler/rustc_const_eval/src/interpret/terminator.rs
+++ b/compiler/rustc_const_eval/src/interpret/terminator.rs
@@ -29,10 +29,9 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
 
             Goto { target } => self.go_to_block(target),
 
-            SwitchInt { ref discr, ref targets, switch_ty } => {
+            SwitchInt { ref discr, ref targets } => {
                 let discr = self.read_immediate(&self.eval_operand(discr, None)?)?;
                 trace!("SwitchInt({:?})", *discr);
-                assert_eq!(discr.layout.ty, switch_ty);
 
                 // Branch to the `otherwise` case by default, if no match is found.
                 let mut target_block = targets.otherwise();
diff --git a/compiler/rustc_const_eval/src/transform/validate.rs b/compiler/rustc_const_eval/src/transform/validate.rs
index 5c9263dc5e3..64318f5f54d 100644
--- a/compiler/rustc_const_eval/src/transform/validate.rs
+++ b/compiler/rustc_const_eval/src/transform/validate.rs
@@ -686,17 +686,8 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
             TerminatorKind::Goto { target } => {
                 self.check_edge(location, *target, EdgeKind::Normal);
             }
-            TerminatorKind::SwitchInt { targets, switch_ty, discr } => {
-                let ty = discr.ty(&self.body.local_decls, self.tcx);
-                if ty != *switch_ty {
-                    self.fail(
-                        location,
-                        format!(
-                            "encountered `SwitchInt` terminator with type mismatch: {:?} != {:?}",
-                            ty, switch_ty,
-                        ),
-                    );
-                }
+            TerminatorKind::SwitchInt { targets, discr } => {
+                let switch_ty = discr.ty(&self.body.local_decls, self.tcx);
 
                 let target_width = self.tcx.sess.target.pointer_width;