[Sema] Only define function as move assignment when needed

Fixes PR27941, a crash on invalid.

Differential revision: http://reviews.llvm.org/D20923

llvm-svn: 273193

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp b/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp
index 2aaf6197b64..16e20ff4964 100644
--- a/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp
+++ b/clang/test/SemaCXX/cxx0x-defaulted-functions.cpp
@@ -196,3 +196,15 @@ namespace PR15597 {
   A<int> a;
   B<int> b; // expected-note {{here}}
 }
+
+namespace PR27941 {
+struct ExplicitBool {
+  ExplicitBool &operator=(bool) = default; // expected-error{{only special member functions may be defaulted}}
+  int member;
+};
+
+int fn() {
+  ExplicitBool t;
+  t = true;
+}
+}