1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
//@ run-pass
// Regression test for Issue #30530: alloca's created for storing
// intermediate scratch values during brace-less match arms need to be
// initialized with their drop-flag set to "dropped" (or else we end
// up running the destructors on garbage data at the end of the
// function).
pub enum Handler {
Default,
#[allow(dead_code)]
Custom(*mut Box<dyn Fn()>),
}
fn main() {
#[allow(unused_must_use)] {
take(Handler::Default, Box::new(main));
}
}
#[inline(never)]
pub fn take(h: Handler, f: Box<dyn Fn()>) -> Box<dyn Fn()> {
unsafe {
match h {
Handler::Custom(ptr) => *Box::from_raw(ptr),
Handler::Default => f,
}
}
}
|
