rust/tests/compile-fail/cast_fn_ptr.rs

fn main() {
    fn f() {}

    let g = unsafe {
        std::mem::transmute::<fn(), fn(i32)>(f)
    };

    g(42) //~ ERROR tried to call a function with sig fn() through a function pointer of type fn(i32)
}
Update for changes in rustc. 2016-08-27 02:44:46 -05:00			`fn main() {`
forbid calling functions through pointers of a different type 2016-06-14 03:34:54 -05:00			`fn f() {}`

change the block and stmt position after a function call returns previously we moved to the target block before calling a function, so when inspecting the stack, it appeared as if we were in the first statement of the next block. 2016-07-06 10:55:05 -05:00			`let g = unsafe {`
forbid calling functions through pointers of a different type 2016-06-14 03:34:54 -05:00			`std::mem::transmute::<fn(), fn(i32)>(f)`
			`};`

Rustup to rustc 1.17.0-nightly (be760566c 2017-02-28) 2017-03-02 06:11:33 -06:00			`g(42) //~ ERROR tried to call a function with sig fn() through a function pointer of type fn(i32)`
forbid calling functions through pointers of a different type 2016-06-14 03:34:54 -05:00			`}`