Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

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

1 files changed, 36 insertions, 0 deletions

diff --git a/src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unrelated.rs b/src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unrelated.rs
new file mode 100644
index 000000000..c6eea5323
--- /dev/null
+++ b/src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unrelated.rs
@@ -0,0 +1,36 @@
+// edition:2018
+
+trait Trait<'a, 'b> {}
+impl<T> Trait<'_, '_> for T {}
+
+// `Ordinary<'a> <: Ordinary<'b>` if `'a: 'b`, as with most types.
+//
+// I am purposefully avoiding the terms co- and contra-variant because
+// their application to regions depends on how you interpreted Rust
+// regions. -nikomatsakis
+struct Ordinary<'a>(&'a u8);
+
+// Here we get an error because none of our choices (either `'d` nor `'e`) are outlived
+// by both `'a` and `'b`.
+
+fn upper_bounds<'a, 'b, 'c, 'd, 'e>(a: Ordinary<'a>, b: Ordinary<'b>) -> impl Trait<'d, 'e>
+where
+    'a: 'e,
+    'b: 'd,
+{
+    // Hidden type `Ordinary<'0>` with constraints:
+    //
+    // ```
+    // 'a: '0
+    // 'b: '0
+    // 'a in ['d, 'e]
+    // ```
+    if condition() { a } else { b }
+    //~^ ERROR hidden type for `impl Trait<'d, 'e>` captures lifetime that does not appear in bounds
+}
+
+fn condition() -> bool {
+    true
+}
+
+fn main() {}