Remove bogus assertion in IdempotentOperationsChecker.

llvm-svn: 127687

clang/lib/StaticAnalyzer/Checkers/IdempotentOperationChecker.cpp

@@ -336,10 +336,9 @@ void IdempotentOperationChecker::checkPostStmt(const BinaryOperator *B,
     = cast<StmtPoint>(C.getPredecessor()->getLocation()).getStmt();
   
   // Ignore implicit calls to setters.
-  if (isa<ObjCPropertyRefExpr>(predStmt))
+  if (!isa<BinaryOperator>(predStmt))
     return;
 
-  assert(isa<BinaryOperator>(predStmt));
   Data.explodedNodes.Add(C.getPredecessor());
 }
 

clang/test/Analysis/idempotent-operations.m

@@ -40,3 +40,15 @@ void pr9116(NSObject *placeholder) {
   int x = placeholder.media.locked = placeholder ? 1 : 0;
 }
 
+// <rdar://problem/9130239>: Test that calling property setters doesn't 
+// trigger an assertion failure when the object is nil.
+@interface RDar9130239
+@property (assign) id delegate;
+@end
+
+void test_RDar9130239(RDar9130239 *x) {
+  if (x)
+    return;
+  x.delegate = x; // no-warning
+}
+