2 files changed, 37 insertions, 1 deletions
diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp
index 4d4c82be699..95737af18ac 100644
--- a/clang/lib/Sema/SemaDeclObjC.cpp
+++ b/clang/lib/Sema/SemaDeclObjC.cpp
@@ -610,7 +610,7 @@ void Sema::CheckProtocolMethodDefs(SourceLocation ImpLoc,
        E = PDecl->instmeth_end(); I != E; ++I) {
     ObjCMethodDecl *method = *I;
     if (method->getImplementationControl() != ObjCMethodDecl::Optional && 
-        !InsMap.count(method->getSelector()) &&
+        !method->isSynthesized() && !InsMap.count(method->getSelector()) &&
         (!Super || !Super->lookupInstanceMethod(method->getSelector())))
       WarnUndefinedMethod(ImpLoc, method, IncompleteImpl);
   }
diff --git a/clang/test/SemaObjC/property-noprotocol-warning.m b/clang/test/SemaObjC/property-noprotocol-warning.m
new file mode 100644
index 00000000000..021c7874a99
--- /dev/null
+++ b/clang/test/SemaObjC/property-noprotocol-warning.m
@@ -0,0 +1,36 @@
+// RUN: clang -fsyntax-only -verify %s
+
+
+@interface Object
+- (id) new;
+@end
+
+@protocol GCObject
+@property int class;
+@end
+
+@protocol DerivedGCObject <GCObject>
+@property int Dclass;
+@end
+
+@interface GCObject  : Object <DerivedGCObject> {
+    int ifield;
+    int iOwnClass;
+    int iDclass;
+}
+@property int OwnClass;
+@end
+
+@implementation GCObject : Object
+@synthesize class=ifield;
+@synthesize Dclass=iDclass;
+@synthesize OwnClass=iOwnClass;
+@end
+
+int main(int argc, char **argv) {
+    GCObject *f = [GCObject new];
+    f.class = 5;
+    f.Dclass = 1;
+    f.OwnClass = 3;
+    return f.class + f.Dclass  + f.OwnClass - 9;
+}