Fix <rdar://problem/5987482> clang on xcode: null dereference in Sema::ActOnMemberReferenceExpr.
In addition to fixing the crasher, this commit fixes further improves property lookup (by searching protocols of qualified interfaces..."NSObject <prot>").
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52001 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/objc-props-on-prots.m b/test/Sema/objc-props-on-prots.m
new file mode 100644
index 0000000..aa5be25
--- /dev/null
+++ b/test/Sema/objc-props-on-prots.m
@@ -0,0 +1,65 @@
+// RUN: clang -fsyntax-only -verify %s
+typedef signed char BOOL;
+@class NSInvocation, NSMethodSignature, NSCoder, NSString, NSEnumerator;
+
+@protocol NSObject
+- (BOOL) isEqual:(id) object;
+@end
+
+@protocol NSCoding
+- (void) encodeWithCoder:(NSCoder *) aCoder;
+@end
+
+@interface NSObject < NSObject > {} @end
+
+typedef float CGFloat;
+
+@interface NSResponder:NSObject < NSCoding > {} @end
+
+@class XCElementView;
+
+typedef struct _XCElementInset {} XCElementInset;
+
+@protocol XCElementP < NSObject >
+-(BOOL) vertical;
+@end
+
+@protocol XCElementDisplayDelegateP;
+@protocol XCElementTabMarkerP;
+
+typedef NSObject < XCElementTabMarkerP > XCElementTabMarker;
+
+@protocol XCElementTabberP < XCElementP >
+-(void) setMarker:(XCElementTabMarker *) marker;
+@end
+
+typedef NSObject < XCElementTabberP > XCElementTabber;
+
+@protocol XCElementTabMarkerP < NSObject >
+@property(nonatomic)
+BOOL variableSized;
+@end
+
+@protocol XCElementJustifierP < XCElementP >
+-(void) setHJustification:(CGFloat) hJust;
+@end
+
+typedef NSObject < XCElementJustifierP > XCElementJustifier;
+@interface XCElementImp:NSObject < XCElementP > {}
+@end
+
+@class XCElementImp;
+
+@interface XCElementTabberImp:XCElementImp < XCElementTabberP > {
+ XCElementTabMarker *_marker;
+}
+@end
+
+@implementation XCElementTabberImp
+- (void) setMarker:(XCElementTabMarker *) marker {
+ if (_marker && _marker.variableSized) {
+ }
+}
+- vertical { return self; }
+- (BOOL)isEqual:x { return 1; }
+@end