Sema: Don't crash when trying to instantiate a local class with an invalid base specifier

It was previously thought that Sema::InstantiateClass could not fail
from within this point in instantiate.

However, it can happen if the class is invalid some way (i.e. invalid
base specifier).

This fixes PR18907.

Differential Revision: http://llvm-reviews.chandlerc.com/D2850

llvm-svn: 201913

1 files changed, 14 insertions, 1 deletions

diff --git a/clang/test/SemaTemplate/instantiate-local-class.cpp b/clang/test/SemaTemplate/instantiate-local-class.cpp
index 2bf24c2188e..c9897b9c614 100644
--- a/clang/test/SemaTemplate/instantiate-local-class.cpp
+++ b/clang/test/SemaTemplate/instantiate-local-class.cpp
@@ -1,5 +1,4 @@
 // RUN: %clang_cc1 -verify -std=c++11 %s
-// expected-no-diagnostics
 template<typename T>
 void f0() {
   struct X;
@@ -181,3 +180,17 @@ namespace PR14373 {
     return 0;
   }
 }
+
+namespace PR18907 {
+template <typename>
+class C : public C<int> {}; // expected-error{{within its own definition}}
+
+template <typename X>
+void F() {
+  struct A : C<X> {};
+}
+
+struct B {
+  void f() { F<int>(); }
+};
+}