mirror of https://github.com/rust-lang/rust
37 lines
874 B
Rust
37 lines
874 B
Rust
// check that panics in destructors during assignment do not leave
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// destroyed values lying around for other destructors to observe.
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//@ run-fail
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//@ error-pattern:panicking destructors ftw!
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//@ ignore-emscripten no processes
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struct Observer<'a>(&'a mut FilledOnDrop);
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struct FilledOnDrop(u32);
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impl Drop for FilledOnDrop {
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fn drop(&mut self) {
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if self.0 == 0 {
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// this is only set during the destructor - safe
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// code should not be able to observe this.
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self.0 = 0x1c1c1c1c;
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panic!("panicking destructors ftw!");
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}
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}
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}
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impl<'a> Drop for Observer<'a> {
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fn drop(&mut self) {
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assert_eq!(self.0 .0, 1);
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}
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}
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fn foo(b: &mut Observer) {
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*b.0 = FilledOnDrop(1);
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}
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fn main() {
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let mut bomb = FilledOnDrop(0);
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let mut observer = Observer(&mut bomb);
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foo(&mut observer);
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}
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