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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-25549-multiple-drop.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-25549-multiple-drop.rs b/src/test/ui/issues/issue-25549-multiple-drop.rs new file mode 100644 index 000000000..25a2da707 --- /dev/null +++ b/src/test/ui/issues/issue-25549-multiple-drop.rs @@ -0,0 +1,33 @@ +// run-pass +#![allow(unused_variables)] +struct Foo<'r>(&'r mut i32); + +impl<'r> Drop for Foo<'r> { + fn drop(&mut self) { + *self.0 += 1; + } +} + +trait Trait {} +impl<'r> Trait for Foo<'r> {} + +struct Holder<T: ?Sized>(T); + +fn main() { + let mut drops = 0; + + { + let y = &Holder([Foo(&mut drops)]) as &Holder<[Foo]>; + // this used to cause an extra drop of the Foo instance + let x = &y.0; + } + assert_eq!(1, drops); + + drops = 0; + { + let y = &Holder(Foo(&mut drops)) as &Holder<dyn Trait>; + // this used to cause an extra drop of the Foo instance + let x = &y.0; + } + assert_eq!(1, drops); +} |