Auto merge of #117229 - matthewjasper:thir-unsafeck-fixes, r=cjgillot

Thir unsafeck fixes

- Recognise thread local statics in THIR unsafeck
- Add suggestion for unsafe_op_in_unsafe_fn
- Fix unsafe checking of let expressions

compiler/rustc_middle/src/thir/visit.rs

@@ -66,8 +66,9 @@ pub fn walk_expr<'a, 'tcx: 'a, V: Visitor<'a, 'tcx>>(visitor: &mut V, expr: &Exp
         Use { source } => visitor.visit_expr(&visitor.thir()[source]),
         NeverToAny { source } => visitor.visit_expr(&visitor.thir()[source]),
         PointerCoercion { source, cast: _ } => visitor.visit_expr(&visitor.thir()[source]),
-        Let { expr, .. } => {
+        Let { expr, ref pat } => {
             visitor.visit_expr(&visitor.thir()[expr]);
+            visitor.visit_pat(pat);
         }
         Loop { body } => visitor.visit_expr(&visitor.thir()[body]),
         Match { scrutinee, ref arms, .. } => {