From 29d18a8b93b6a8bf546211093534a747055f556b Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Wed, 30 Jan 2013 02:10:08 +0000
Subject: [PATCH] Unresolved lookups can have using declarations that refer to
 unresolved using declarations. Fixes PR14768 / <rdar://problem/13030296>.

llvm-svn: 173883
---
 clang/include/clang/Sema/Lookup.h                        | 2 +-
 .../CXX/dcl.dcl/basic.namespace/namespace.udecl/p10.cpp  | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/clang/include/clang/Sema/Lookup.h b/clang/include/clang/Sema/Lookup.h
index 68b36e7d3cab..3e7e3a16ebc8 100644
--- a/clang/include/clang/Sema/Lookup.h
+++ b/clang/include/clang/Sema/Lookup.h
@@ -625,7 +625,7 @@ private:
 
   bool sanityCheckUnresolved() const {
     for (iterator I = begin(), E = end(); I != E; ++I)
-      if (isa<UnresolvedUsingValueDecl>(*I))
+      if (isa<UnresolvedUsingValueDecl>((*I)->getUnderlyingDecl()))
         return true;
     return false;
   }
diff --git a/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p10.cpp b/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p10.cpp
index ae40062fe14c..a38ff15525d2 100644
--- a/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p10.cpp
+++ b/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p10.cpp
@@ -33,3 +33,12 @@ namespace test1 {
   }
 }
 
+// PR 14768
+namespace PR14768 {
+  template<typename eT> class Mat;
+  template<typename eT> class Col : public Mat<eT>   {
+    using Mat<eT>::operator();
+    using Col<eT>::operator();
+    void operator() ();
+  };
+}