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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/drop/issue-90752-raw-ptr-shenanigans.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/test/ui/drop/issue-90752-raw-ptr-shenanigans.rs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/test/ui/drop/issue-90752-raw-ptr-shenanigans.rs b/src/test/ui/drop/issue-90752-raw-ptr-shenanigans.rs new file mode 100644 index 000000000..4e67b3594 --- /dev/null +++ b/src/test/ui/drop/issue-90752-raw-ptr-shenanigans.rs @@ -0,0 +1,41 @@ +// run-pass + +use std::cell::RefCell; + +struct S<'a>(i32, &'a RefCell<Vec<i32>>); + +impl<'a> Drop for S<'a> { + fn drop(&mut self) { + self.1.borrow_mut().push(self.0); + } +} + +fn test(drops: &RefCell<Vec<i32>>) { + let mut foo = None; + let pfoo: *mut _ = &mut foo; + + match foo { + None => (), + _ => return, + } + + // Both S(0) and S(1) should be dropped, but aren't. + unsafe { *pfoo = Some((S(0, drops), S(1, drops))); } + + match foo { + Some((_x, _)) => {} + _ => {} + } +} + +fn main() { + let drops = RefCell::new(Vec::new()); + test(&drops); + + // Ideally, we want this... + //assert_eq!(*drops.borrow(), &[0, 1]); + + // But the delayed access through the raw pointer confuses drop elaboration, + // causing S(1) to be leaked. + assert_eq!(*drops.borrow(), &[0]); +} |