From 87f89f4b3b6cbc70f4236654fe05770f87bb6a4f Mon Sep 17 00:00:00 2001
From: Alexey Bataev <a.bataev@hotmail.com>
Date: Thu, 16 Oct 2014 03:04:35 +0000
Subject: [PATCH] Bugfix in template instantiation in CXXPseudoDestructorExpr.
 Fix for clang crash when instantiating a template with qualified lookup for
 members in non-class types. Differential Revision:
 http://reviews.llvm.org/D5769

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219897 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Sema/TreeTransform.h                      | 13 ++++--
 .../instantiate-non-dependent-types.cpp       | 40 ++++++++++++++++++-
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/lib/Sema/TreeTransform.h b/lib/Sema/TreeTransform.h
index 799678e799..28890f59ce 100644
--- a/lib/Sema/TreeTransform.h
+++ b/lib/Sema/TreeTransform.h
@@ -10510,9 +10510,16 @@ TreeTransform<Derived>::RebuildCXXPseudoDestructorExpr(Expr *Base,
 
   // The scope type is now known to be a valid nested name specifier
   // component. Tack it on to the end of the nested name specifier.
-  if (ScopeType)
-    SS.Extend(SemaRef.Context, SourceLocation(),
-              ScopeType->getTypeLoc(), CCLoc);
+  if (ScopeType) {
+    if (!ScopeType->getType()->getAs<TagType>()) {
+      getSema().Diag(ScopeType->getTypeLoc().getBeginLoc(),
+                     diag::err_expected_class_or_namespace)
+          << ScopeType->getType() << getSema().getLangOpts().CPlusPlus;
+      return ExprError();
+    }
+    SS.Extend(SemaRef.Context, SourceLocation(), ScopeType->getTypeLoc(),
+              CCLoc);
+  }
 
   SourceLocation TemplateKWLoc; // FIXME: retrieve it from caller.
   return getSema().BuildMemberReferenceExpr(Base, BaseType,
diff --git a/test/SemaTemplate/instantiate-non-dependent-types.cpp b/test/SemaTemplate/instantiate-non-dependent-types.cpp
index a0005c5667..432b9053bd 100644
--- a/test/SemaTemplate/instantiate-non-dependent-types.cpp
+++ b/test/SemaTemplate/instantiate-non-dependent-types.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
 template<typename T>
 struct X1 {
   static void member() { T* x = 1; } // expected-error{{cannot initialize a variable of type 'int *' with an rvalue of type 'int'}}
@@ -11,4 +12,41 @@ struct X2 {
   typedef instantiate<&X1<int>::member> i; // expected-note{{in instantiation of}}
 };
 
-X2<int> x; 
+X2<int> x;
+
+template <class T, class A> class C {
+public:
+  int i;
+  void f(T &t) {
+    T *q = new T();
+    t.T::~T();
+    q->~T();
+    // expected-error@+2 {{'int' is not a class, namespace, or scoped enumeration}}
+    // expected-error@+1 {{no member named '~Colors' in 'Colors'}}
+    q->A::~A();
+    // expected-error@+2 {{no member named '~int' in 'Q'}}
+    // expected-error@+1 {{no member named '~Colors' in 'Q'}}
+    q->~A();
+
+    delete q;
+  }
+};
+
+class Q {
+public:
+  Q() {}
+  ~Q() {}
+};
+
+enum Colors {red, green, blue};
+
+C<Q, int> dummy;
+C<Q, Colors> dummyColors;
+int main() {
+  Q qinst;
+  // expected-note@+1 {{in instantiation of member function 'C<Q, int>::f' requested here}}
+  dummy.f(qinst);
+  // expected-note@+1 {{in instantiation of member function 'C<Q, Colors>::f' requested here}}
+  dummyColors.f(qinst);
+}
+
-- 
2.40.0