| //@ 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()); | |
| } |