Fix crash in cleanup attr handling

ResolveSingleFunctionTemplateSpecialization() returns 0 and doesn't emit diags
unless the expression has template-ids, so we must null check the result.

Also add a better diag noting which overloads are causing the problem.

Reviewed by Aaron Ballman.

llvm-svn: 193055

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/attr-cleanup.cpp b/clang/test/SemaCXX/attr-cleanup.cpp
index b6c58533acf..764df997dec 100644
--- a/clang/test/SemaCXX/attr-cleanup.cpp
+++ b/clang/test/SemaCXX/attr-cleanup.cpp
@@ -19,3 +19,11 @@ class D : public C {
     int v1 __attribute__((cleanup(c2)));  // expected-error {{'c2' is a private member of 'C'}}

   }

 };

+

+namespace E {

+  void c3(int *a) {} // expected-note {{candidate function}}

+  void c3() {}       // expected-note {{candidate function}}

+  void t3() {

+    int v1 __attribute__((cleanup(c3))); // expected-error {{'c3' is not a single function}}

+  }

+}