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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-57156.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-57156.rs b/src/test/ui/issues/issue-57156.rs new file mode 100644 index 000000000..9f5ec9f27 --- /dev/null +++ b/src/test/ui/issues/issue-57156.rs @@ -0,0 +1,23 @@ +// check-pass + +trait Foo<Args> { + type Output; +} + +trait Bar<'a, T>: for<'s> Foo<&'s T, Output=bool> { + fn cb(&self) -> Box<dyn Bar<'a, T, Output=bool>>; +} + +impl<'s> Foo<&'s ()> for () { + type Output = bool; +} + +impl<'a> Bar<'a, ()> for () { + fn cb(&self) -> Box<dyn Bar<'a, (), Output=bool>> { + Box::new(*self) + } +} + +fn main() { + let _t = ().cb(); +} |