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Diffstat (limited to 'tests/ui/coercion/issue-37655.rs')
-rw-r--r-- | tests/ui/coercion/issue-37655.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tests/ui/coercion/issue-37655.rs b/tests/ui/coercion/issue-37655.rs new file mode 100644 index 000000000..416854d66 --- /dev/null +++ b/tests/ui/coercion/issue-37655.rs @@ -0,0 +1,37 @@ +// check-pass +// Regression test for #37655. The problem was a false edge created by +// coercion that wound up requiring that `'a` (in `split()`) outlive +// `'b`, which shouldn't be necessary. + +#![allow(warnings)] + +trait SliceExt<T> { + type Item; + + fn get_me<I>(&self, index: I) -> &I::Output + where I: SliceIndex<Self::Item>; +} + +impl<T> SliceExt<T> for [T] { + type Item = T; + + fn get_me<I>(&self, index: I) -> &I::Output + where I: SliceIndex<T> + { + panic!() + } +} + +pub trait SliceIndex<T> { + type Output: ?Sized; +} + +impl<T> SliceIndex<T> for usize { + type Output = T; +} + +fn foo<'a, 'b>(split: &'b [&'a [u8]]) -> &'a [u8] { + split.get_me(0) +} + +fn main() { } |