Fix an assertion hit in Sema::CheckObjCMethodOverrides.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180651 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaDeclObjC.cpp

@@ -2077,8 +2077,9 @@ bool Sema::MatchTwoMethodDeclarations(const ObjCMethodDecl *left,
 void Sema::addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method) {
   // Record at the head of the list whether there were 0, 1, or >= 2 methods
   // inside categories.
-  if (isa<ObjCCategoryDecl>(Method->getDeclContext()))
+  if (ObjCCategoryDecl *
-    if (List->getBits() < 2)
+        CD = dyn_cast<ObjCCategoryDecl>(Method->getDeclContext()))
+    if (!CD->IsClassExtension() && List->getBits() < 2)
         List->setBits(List->getBits()+1);
 
   // If the list is empty, make it a singleton list.
@@ -2828,7 +2829,8 @@ void Sema::CheckObjCMethodOverrides(ObjCMethodDecl *ObjCMethod,
               for (OverrideSearch::iterator
                      OI= overrides.begin(), OE= overrides.end(); OI!=OE; ++OI) {
                 ObjCMethodDecl *SuperOverridden = *OI;
-                if (CurrentClass != SuperOverridden->getClassInterface()) {
+                if (isa<ObjCProtocolDecl>(SuperOverridden->getDeclContext()) ||
+                    CurrentClass != SuperOverridden->getClassInterface()) {
                   hasOverriddenMethodsInBaseOrProtocol = true;
                   overridden->setOverriding(true);
                   break;

test/SemaObjC/protocol-lookup-2.m

@@ -32,3 +32,26 @@
 }
 
 @end
+
+
+@protocol ProtC
+-document;
+@end
+
+@interface I1 : NSObject
+@end
+
+@interface I1(cat)
+-document;
+@end
+
+@interface I2 : NSObject
+-document;
+@end
+
+@interface I2() <ProtC>
+@end
+
+@implementation I2
+- document { return 0; }
+@end