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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/issues/issue-38437.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/issues/issue-38437.rs | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-38437.rs b/src/test/ui/issues/issue-38437.rs new file mode 100644 index 000000000..e14121690 --- /dev/null +++ b/src/test/ui/issues/issue-38437.rs @@ -0,0 +1,46 @@ +// run-pass +#![allow(dead_code)] +// Check that drop elaboration clears the "master" discriminant +// drop flag even if it protects no fields. + +struct Good(usize); +impl Drop for Good { + #[inline(never)] + fn drop(&mut self) { + println!("dropping Good({})", self.0); + } +} + +struct Void; +impl Drop for Void { + #[inline(never)] + fn drop(&mut self) { + panic!("Suddenly, a Void appears."); + } +} + +enum E { + Never(Void), + Fine(Good) +} + +fn main() { + let mut go = true; + + loop { + let next; + match go { + true => next = E::Fine(Good(123)), + false => return, + } + + match next { + E::Never(_) => return, + E::Fine(_good) => go = false, + } + + // `next` is dropped and StorageDead'd here. We must reset the + // discriminant's drop flag to avoid random variants being + // dropped. + } +} |