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// RUN: %clang_cc1 %s -fsyntax-only -verify -fblocks
// rdar://10734265
@class NSObject;
typedef void (^block1_t)(int arg);
typedef void (^block2_t)(block1_t arg);
typedef void (^block3_t)(NSObject *arg);
typedef void (^block4_t)(id arg);
void fn(block4_t arg); // expected-note {{passing argument to parameter 'arg' here}}
void another_fn(block2_t arg);
int main() {
block1_t b1;
block2_t b2;
block3_t b3;
block3_t b4;
block4_t b5;
fn(b1); // expected-error {{incompatible block pointer types passing 'block1_t' (aka 'void (^)(int)') to parameter of type 'block4_t' (aka 'void (^)(id)')}}
fn(b2); // must succeed: block1_t *is* compatible with id
fn(b3); // succeeds: NSObject* compatible with id
fn(b4); // succeeds: id compatible with id
another_fn(b5);
}
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