clang-tests/gcc-4_2-testsuite/src/obj-c++.dg/bad-receiver-type.mm

// { dg-do compile } 
// { dg-options "" }

@interface A

- (void)test; 

@end

extern int foo();

void baz()
{
    [foo test]; /* { dg-warning "receiver type .+ or interface pointer, consider casting it" } */
}