diff options
Diffstat (limited to 'tests/ui/issues/issue-30380.rs')
-rw-r--r-- | tests/ui/issues/issue-30380.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/issues/issue-30380.rs b/tests/ui/issues/issue-30380.rs new file mode 100644 index 000000000..48b329c5d --- /dev/null +++ b/tests/ui/issues/issue-30380.rs @@ -0,0 +1,36 @@ +// check that panics in destructors during assignment do not leave +// destroyed values lying around for other destructors to observe. + +// run-fail +// error-pattern:panicking destructors ftw! +// ignore-emscripten no processes + +struct Observer<'a>(&'a mut FilledOnDrop); + +struct FilledOnDrop(u32); +impl Drop for FilledOnDrop { + fn drop(&mut self) { + if self.0 == 0 { + // this is only set during the destructor - safe + // code should not be able to observe this. + self.0 = 0x1c1c1c1c; + panic!("panicking destructors ftw!"); + } + } +} + +impl<'a> Drop for Observer<'a> { + fn drop(&mut self) { + assert_eq!(self.0 .0, 1); + } +} + +fn foo(b: &mut Observer) { + *b.0 = FilledOnDrop(1); +} + +fn main() { + let mut bomb = FilledOnDrop(0); + let mut observer = Observer(&mut bomb); + foo(&mut observer); +} |