|  | // RUN: %clang_cc1 -x objective-c -Wno-return-type -fblocks -fms-extensions -rewrite-objc -fobjc-runtime=macosx-fragile-10.5  %s -o %t-rw.cpp | 
|  | // RUN: %clang_cc1 -Wno-address-of-temporary -Did="void *" -D"SEL=void*" -D"__declspec(X)=" -emit-llvm -o %t %t-rw.cpp | 
|  |  | 
|  | void *sel_registerName(const char *); | 
|  |  | 
|  | @interface Test { | 
|  | } | 
|  | @end | 
|  |  | 
|  | @implementation Test | 
|  |  | 
|  | - (void)enumerateProvidersWithBlock:(void (^)(void))block { | 
|  | block(); | 
|  | } | 
|  |  | 
|  | - (void)providerEnumerator { | 
|  | ^(void (^providerBlock)(void)) { | 
|  | [self enumerateProvidersWithBlock:providerBlock]; | 
|  | }; | 
|  | } | 
|  |  | 
|  | - (void)testNilBlock { | 
|  | [self enumerateProvidersWithBlock:0]; | 
|  | } | 
|  |  | 
|  | @end | 
|  |  | 
|  |  | 
|  |  | 
|  | int main(int argc, char *argv[]) { | 
|  | return 0; | 
|  | } |