From 21d53e179651657e243587b79234fe6fedfae71c Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Mon, 1 Mar 2010 23:49:23 +0000
Subject: [PATCH] When we're parsing template names as part of base-specifiers,
 we are *not* entering the context of the nested-name-specifier. This was
 causing us to look into an uninstantiated template that we shouldn't look
 into. Fixes PR6376.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97524 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Parse/ParseDeclCXX.cpp               |  2 +-
 test/CXX/temp/temp.decls/temp.mem/p1.cpp | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index bccfc6ad62..993ec3dfd4 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -1084,7 +1084,7 @@ Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) {
 
   // Parse optional '::' and optional nested-name-specifier.
   CXXScopeSpec SS;
-  ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true);
+  ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false);
 
   // The location of the base class itself.
   SourceLocation BaseLoc = Tok.getLocation();
diff --git a/test/CXX/temp/temp.decls/temp.mem/p1.cpp b/test/CXX/temp/temp.decls/temp.mem/p1.cpp
index 1b9da84886..b057eedf93 100644
--- a/test/CXX/temp/temp.decls/temp.mem/p1.cpp
+++ b/test/CXX/temp/temp.decls/temp.mem/p1.cpp
@@ -14,3 +14,22 @@ int foo() {
   A<bool>::cond = true;
   return A<bool>::B<int>::twice(4);
 }
+
+namespace PR6376 {
+  template<typename T>
+  struct X {
+    template<typename Y>
+    struct Y { };
+  };
+
+  template<>
+  struct X<float> {
+    template<typename Y>
+    struct Y { };
+  };
+
+  template<typename T, typename U>
+  struct Z : public X<T>::template Y<U> { };
+
+  Z<float, int> z0;
+}
-- 
2.50.1