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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:11:28 +0000 |
commit | 94a0819fe3a0d679c3042a77bfe6a2afc505daea (patch) | |
tree | 2b827afe6a05f3538db3f7803a88c4587fe85648 /library/alloc/src/sync/tests.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-94a0819fe3a0d679c3042a77bfe6a2afc505daea.tar.xz rustc-94a0819fe3a0d679c3042a77bfe6a2afc505daea.zip |
Adding upstream version 1.66.0+dfsg1.upstream/1.66.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | library/alloc/src/sync/tests.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/library/alloc/src/sync/tests.rs b/library/alloc/src/sync/tests.rs index 202d0e7f0..0fae8953a 100644 --- a/library/alloc/src/sync/tests.rs +++ b/library/alloc/src/sync/tests.rs @@ -618,3 +618,22 @@ fn test_arc_cyclic_two_refs() { assert_eq!(Arc::strong_count(&two_refs), 3); assert_eq!(Arc::weak_count(&two_refs), 2); } + +/// Test for Arc::drop bug (https://github.com/rust-lang/rust/issues/55005) +#[test] +#[cfg(miri)] // relies on Stacked Borrows in Miri +fn arc_drop_dereferenceable_race() { + // The bug seems to take up to 700 iterations to reproduce with most seeds (tested 0-9). + for _ in 0..750 { + let arc_1 = Arc::new(()); + let arc_2 = arc_1.clone(); + let thread = thread::spawn(|| drop(arc_2)); + // Spin a bit; makes the race more likely to appear + let mut i = 0; + while i < 256 { + i += 1; + } + drop(arc_1); + thread.join().unwrap(); + } +} |