Auto merge of #60649 - Xanewok:save-analysis-assoc-const-ice, r=oli-obk

save-analysis: Fix ICE when processing associated constant

Closes #59134
Closes https://github.com/rust-lang/rls/issues/1449

Thanks @swgillespie for helping tracking this down and fixing it!

r? @eddyb

src/librustc_save_analysis/dump_visitor.rs

@@ -463,10 +463,12 @@ impl<'l, 'tcx: 'l, 'll, O: DumpOutput + 'll> DumpVisitor<'l, 'tcx, 'll, O> {
         }
 
         // walk type and init value
-        self.visit_ty(typ);
-        if let Some(expr) = expr {
-            self.visit_expr(expr);
-        }
+        self.nest_tables(id, |v| {
+            v.visit_ty(typ);
+            if let Some(expr) = expr {
+                v.visit_expr(expr);
+            }
+        });
     }
 
     // FIXME tuple structs should generate tuple-specific data.

src/test/ui/save-analysis/issue-59134-0.rs

@@ -0,0 +1,12 @@
+// compile-flags: -Zsave-analysis
+
+// Check that this doesn't ICE when processing associated const (field expr).
+
+pub fn f() {
+    trait Trait {}
+    impl Trait {
+        const FLAG: u32 = bogus.field; //~ ERROR cannot find value `bogus`
+    }
+}
+
+fn main() {}

src/test/ui/save-analysis/issue-59134-0.stderr

@@ -0,0 +1,9 @@
+error[E0425]: cannot find value `bogus` in this scope
+  --> $DIR/issue-59134-0.rs:8:27
+   |
+LL |         const FLAG: u32 = bogus.field;
+   |                           ^^^^^ not found in this scope
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0425`.

src/test/ui/save-analysis/issue-59134-1.rs

@@ -0,0 +1,12 @@
+// compile-flags: -Zsave-analysis
+
+// Check that this doesn't ICE when processing associated const (type).
+
+fn func() {
+    trait Trait {
+        type MyType;
+        const CONST: Self::MyType = bogus.field; //~ ERROR cannot find value `bogus`
+    }
+}
+
+fn main() {}

src/test/ui/save-analysis/issue-59134-1.stderr

@@ -0,0 +1,9 @@
+error[E0425]: cannot find value `bogus` in this scope
+  --> $DIR/issue-59134-1.rs:8:37
+   |
+LL |         const CONST: Self::MyType = bogus.field;
+   |                                     ^^^^^ not found in this scope
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0425`.