rust/tests/fail/validity/cast_fn_ptr2.rs
2022-06-01 10:53:38 -04:00

12 lines
436 B
Rust

fn main() {
// Cast a function pointer such that when returning, the return value gets transmuted
// from raw ptr to reference. This is ABI-compatible, so it's not the call that
// should fail, but validation should.
fn f() -> *const i32 { 0usize as *const i32 }
let g: fn() -> &'static i32 = unsafe { std::mem::transmute(f as fn() -> *const i32) };
let _x = g();
//~^ ERROR encountered a null reference
}