1 files changed, 20 insertions, 0 deletions
diff --git a/test/SemaCXX/copy-initialization.cpp b/test/SemaCXX/copy-initialization.cpp
index 3a63be0970de5..e5b1fd766bbd4 100644
--- a/test/SemaCXX/copy-initialization.cpp
+++ b/test/SemaCXX/copy-initialization.cpp
@@ -21,3 +21,23 @@ struct foo {
 
 // PR3600
 void test(const foo *P) { P->bar(); } // expected-error{{cannot initialize object parameter of type 'foo' with an expression of type 'foo const'}}
+
+namespace PR6757 {
+  struct Foo {
+    Foo();
+    Foo(Foo&);
+  };
+
+  struct Bar {
+    operator const Foo&() const;
+  };
+
+  void f(Foo); // expected-note{{candidate function not viable: no known conversion from 'PR6757::Bar' to 'PR6757::Foo' for 1st argument}}
+
+  // FIXME: This isn't really the right reason for the failure. We
+  // should fail after overload resolution.
+  void g(Foo foo) {
+    f(Bar()); // expected-error{{no matching function for call to 'f'}}
+    f(foo);
+  }
+}