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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-21486.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-21486.rs | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-21486.rs b/src/test/ui/issues/issue-21486.rs new file mode 100644 index 000000000..46d6ccd56 --- /dev/null +++ b/src/test/ui/issues/issue-21486.rs @@ -0,0 +1,77 @@ +// run-pass +#![allow(unreachable_code)] +// Issue #21486: Make sure that all structures are dropped, even when +// created via FRU and control-flow breaks in the middle of +// construction. + +use std::sync::atomic::{Ordering, AtomicUsize}; + +#[derive(Debug)] +struct Noisy(u8); +impl Drop for Noisy { + fn drop(&mut self) { + // println!("splat #{}", self.0); + event(self.0); + } +} + +#[allow(dead_code)] +#[derive(Debug)] +struct Foo { n0: Noisy, n1: Noisy } +impl Foo { + fn vals(&self) -> (u8, u8) { (self.n0.0, self.n1.0) } +} + +fn leak_1_ret() -> Foo { + let _old_foo = Foo { n0: Noisy(1), n1: Noisy(2) }; + Foo { n0: { return Foo { n0: Noisy(3), n1: Noisy(4) } }, + .._old_foo + }; +} + +fn leak_2_ret() -> Foo { + let _old_foo = Foo { n0: Noisy(1), n1: Noisy(2) }; + Foo { n1: { return Foo { n0: Noisy(3), n1: Noisy(4) } }, + .._old_foo + }; +} + +// In this case, the control flow break happens *before* we construct +// `Foo(Noisy(1),Noisy(2))`, so there should be no record of it in the +// event log. +fn leak_3_ret() -> Foo { + let _old_foo = || Foo { n0: Noisy(1), n1: Noisy(2) }; + Foo { n1: { return Foo { n0: Noisy(3), n1: Noisy(4) } }, + .._old_foo() + }; +} + +pub fn main() { + reset_log(); + assert_eq!(leak_1_ret().vals(), (3,4)); + assert_eq!(0x01_02_03_04, event_log()); + + reset_log(); + assert_eq!(leak_2_ret().vals(), (3,4)); + assert_eq!(0x01_02_03_04, event_log()); + + reset_log(); + assert_eq!(leak_3_ret().vals(), (3,4)); + assert_eq!(0x03_04, event_log()); +} + +static LOG: AtomicUsize = AtomicUsize::new(0); + +fn reset_log() { + LOG.store(0, Ordering::SeqCst); +} + +fn event_log() -> usize { + LOG.load(Ordering::SeqCst) +} + +fn event(tag: u8) { + let old_log = LOG.load(Ordering::SeqCst); + let new_log = (old_log << 8) + tag as usize; + LOG.store(new_log, Ordering::SeqCst); +} |