Adding upstream version 1.68.2+dfsg1.upstream/1.68.2+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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() { }