When we are performing copy initialization of a class type via its

copy constructor, suppress user-defined conversions on the
argument. Otherwise, we can end up in a recursion loop where the
bind the argument of the copy constructor to another copy constructor call,
whose argument is then a copy constructor call...

Found by Boost.Regex which, alas, still isn't building.

llvm-svn: 102269

1 files changed, 14 insertions, 1 deletions

diff --git a/clang/test/SemaCXX/conversion-function.cpp b/clang/test/SemaCXX/conversion-function.cpp
index dfc06506419..3e96d02495f 100644
--- a/clang/test/SemaCXX/conversion-function.cpp
+++ b/clang/test/SemaCXX/conversion-function.cpp
@@ -56,7 +56,7 @@ public:
 
 // This used to crash Clang.
 struct Flip;
-struct Flop { // expected-note{{candidate is the implicit copy constructor}}
+struct Flop {
   Flop();
   Flop(const Flip&); // expected-note{{candidate constructor}}
 };
@@ -202,3 +202,16 @@ namespace smart_ptr {
     return X(Y());
   }
 }
+
+struct Any {
+  Any(...);
+};
+
+struct Other {
+  Other(const Other &); 
+  Other();
+};
+
+void test_any() {
+  Any any = Other(); // expected-error{{cannot pass object of non-POD type 'Other' through variadic constructor; call will abort at runtime}}
+}