1 files changed, 19 insertions, 0 deletions
diff --git a/clang/test/SemaObjC/receiver-forward-class.m b/clang/test/SemaObjC/receiver-forward-class.m
new file mode 100644
index 0000000..cefb5d7
--- /dev/null
+++ b/clang/test/SemaObjC/receiver-forward-class.m
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -fsyntax-only -Wreceiver-forward-class -verify %s
+// RUN: %clang_cc1 -x objective-c++ -fsyntax-only  -Wreceiver-forward-class -verify %s
+// rdar://10686120
+
+@class A; // expected-note {{forward declaration of class here}}
+
+@interface B
+-(int) width; // expected-note {{using}}
+@end
+@interface C
+-(float) width; // expected-note {{also found}}
+@end
+
+int f0(A *x) {
+  return [x width]; // expected-warning {{receiver type 'A' for instance message is a forward declaration}} \
+                    // expected-warning {{multiple methods named 'width' found}} \
+                    // expected-note {{receiver is treated with 'id' type for purpose of method lookup}}
+}
+