Fix a bug which creduce found reducing PR12585.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@155185 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 10 insertions, 1 deletions

diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index ff8c4dacc2..a0b996beec 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -938,7 +938,7 @@ Sema::CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK,
       while (!OutermostContext->isFileContext())
         OutermostContext = OutermostContext->getLookupParent();
 
-      if (PrevDecl &&
+      if (PrevClassTemplate &&
           (OutermostContext->Equals(PrevDecl->getDeclContext()) ||
            OutermostContext->Encloses(PrevDecl->getDeclContext()))) {
         SemanticContext = PrevDecl->getDeclContext();
diff --git a/test/SemaTemplate/class-template-decl.cpp b/test/SemaTemplate/class-template-decl.cpp
index ec4e016385..4d69ac4f71 100644
--- a/test/SemaTemplate/class-template-decl.cpp
+++ b/test/SemaTemplate/class-template-decl.cpp
@@ -95,3 +95,12 @@ namespace rdar9676205 {
   };
 }
 
+namespace Redecl {
+  struct S {
+    int packaged_task;
+    template<typename> class future {
+      template<typename> friend class packaged_task;
+    };
+    future<void> share;
+  };
+}