Don't try to check override control for invalid member functions. Fixes a crash in a corner case. Patch by Olivier Goffart!

llvm-svn: 163337

clang/lib/Sema/SemaDeclCXX.cpp

@@ -1420,6 +1420,9 @@ bool Sema::ActOnAccessSpecifier(AccessSpecifier Access,
 
 /// CheckOverrideControl - Check C++11 override control semantics.
 void Sema::CheckOverrideControl(Decl *D) {
+  if (D->isInvalidDecl())
+    return;
+
   const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D);
 
   // Do we know which functions this declaration might be overriding?

clang/test/SemaTemplate/nested-template.cpp

@@ -155,3 +155,8 @@ namespace PR10924 {
   {
   };
 }
+
+class Outer1 {
+    template <typename T> struct X;
+    template <typename T> int X<T>::func() {} //  expected-error{{out-of-line definition of 'func' from class 'X<T>' without definition}}
+};