================
@@ -20,3 +19,29 @@ struct S : HasVT {
   HasD<> v;
 };
 
+// Ensure we don't get infinite recursion from the check, however. See GH104802
+namespace GH104802 {
+class foo {       // expected-note {{definition of 'GH104802::foo' is not 
complete until the closing '}'}}
+  foo a;          // expected-error {{field has incomplete type 'foo'}}
+
+  virtual int c();
+};
+
+class bar {       // expected-note {{definition of 'GH104802::bar' is not 
complete until the closing '}'}}
+  const bar a;    // expected-error {{field has incomplete type 'const bar'}}
+
+  virtual int c();
+};
+
+class baz {       // expected-note {{definition of 'GH104802::baz' is not 
complete until the closing '}'}}
+  typedef class baz blech;
----------------
AaronBallman wrote:

No need; typedefs already test type canonicalization.

https://github.com/llvm/llvm-project/pull/104829
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