| //@ run-pass |
| //@ needs-threads |
| //@ compile-flags: -O |
| |
| // Tests that the `vec!` macro does not overflow the stack when it is |
| // given data larger than the stack. |
| |
| // FIXME(eddyb) Improve unoptimized codegen to avoid the temporary, |
| // and thus run successfully even when compiled at -C opt-level=0. |
| |
| const LEN: usize = 1 << 15; |
| |
| use std::thread::Builder; |
| |
| fn main() { |
| assert!(Builder::new().stack_size(LEN / 2).spawn(|| { |
| // FIXME(eddyb) this can be vec![[0: LEN]] pending |
| // https://llvm.org/bugs/show_bug.cgi?id=28987 |
| let vec = vec![unsafe { std::mem::zeroed::<[u8; LEN]>() }]; |
| assert_eq!(vec.len(), 1); |
| }).unwrap().join().is_ok()); |
| } |
