Sema: Don't crash when specializing a global scope function in a class

We assumed that class-scope specializations would result in a
CXXMethodDecl for that class.  However, globally qualified functions
will result in normal FunctionDecls.

llvm-svn: 225508

2 files changed, 7 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 8a5047592aa..1e20121b375 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -7482,7 +7482,7 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
     } else if (isFunctionTemplateSpecialization) {
       if (CurContext->isDependentContext() && CurContext->isRecord() 
           && !isFriend) {
-        isDependentClassScopeExplicitSpecialization = true;
+        isDependentClassScopeExplicitSpecialization = isa<CXXMethodDecl>(NewFD);
         Diag(NewFD->getLocation(), getLangOpts().MicrosoftExt ? 
           diag::ext_function_specialization_in_class :
           diag::err_function_specialization_in_class)
diff --git a/clang/test/SemaTemplate/instantiate-method.cpp b/clang/test/SemaTemplate/instantiate-method.cpp
index 4cc40af7e12..c2d4704bc02 100644
--- a/clang/test/SemaTemplate/instantiate-method.cpp
+++ b/clang/test/SemaTemplate/instantiate-method.cpp
@@ -195,3 +195,9 @@ namespace PR22040 {
     Foobar<int>::bazqux(3);  // expected-error{{no member named 'bazqux' in }}
   }
 }
+
+template <typename>
+struct SpecializationOfGlobalFnInClassScope {
+  template <>
+  void ::Fn(); // expected-error{{cannot have a qualified name}} expected-error{{cannot specialize a function}}
+};