Simulate OOM for the `try_oom_error` test · rust-lang/rust@53f488a (original) (raw)

`@@ -811,13 +811,17 @@ fn read_to_end_error() {

811

812

813

`#[test]

814

// Miri does not support signalling OOM

815

#[cfg_attr(miri, ignore)]

816

// 64-bit only to be sure the allocator will fail fast on an impossible to satisfy size

817

#[cfg(target_pointer_width = "64")]

818

814

`fn try_oom_error() {

819

let mut v = Vec::::new();

820

let reserve_err = v.try_reserve(isize::MAX as usize - 1).unwrap_err();

815

use alloc::alloc::Layout;

816

use alloc::collections::{TryReserveError, TryReserveErrorKind};

817

+

818

`` +

// We simulate a Vec::try_reserve error rather than attempting a huge size for real. This way

819

// we're not subject to the whims of optimization that might skip the actual allocation, and it

820

// also works for 32-bit targets and miri that might not OOM at all.

821

let layout = Layout:🆕:();

822

let kind = TryReserveErrorKind::AllocError { layout, non_exhaustive: () };

823

let reserve_err = TryReserveError::from(kind);

824

+

821

825

`let io_err = io::Error::from(reserve_err);

822

826

`assert_eq!(io::ErrorKind::OutOfMemory, io_err.kind());

823

827

Simulate OOM for the try_oom_error test · rust-lang/rust@53f488a (original) (raw)

Simulate OOM for the `try_oom_error` test · rust-lang/rust@53f488a (original) (raw)