[CFG] Fix crash finding destructor of lifetime-extended temporary.

Fix a crash under -Wthread-safety when finding the destructor for a
lifetime-extending reference.

A patch by Nandor Licker!

Differential Revision: https://reviews.llvm.org/D22419

llvm-svn: 277522

1 files changed, 15 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/warn-thread-safety-analysis.cpp b/clang/test/SemaCXX/warn-thread-safety-analysis.cpp
index b5d2f8e1de8..bbb4f9b48d3 100644
--- a/clang/test/SemaCXX/warn-thread-safety-analysis.cpp
+++ b/clang/test/SemaCXX/warn-thread-safety-analysis.cpp
@@ -5160,6 +5160,21 @@ void test3() {
 }  // end namespace  GlobalAcquiredBeforeAfterTest
 
 
+namespace LifetimeExtensionText {
+
+struct Holder {
+  virtual ~Holder() throw() {}
+  int i = 0;
+};
+
+void test() {
+  // Should not crash.
+  const auto &value = Holder().i;
+}
+
+} // end namespace LifetimeExtensionTest
+
+
 namespace LockableUnions {
 
 union LOCKABLE MutexUnion {