1 files changed, 11 insertions, 0 deletions
diff --git a/tests/rustdoc-ui/synthetic-auto-trait-impls/lifetime-generic-user-impl.rs b/tests/rustdoc-ui/synthetic-auto-trait-impls/lifetime-generic-user-impl.rs
new file mode 100644
index 00000000000..31d1b11ff31
--- /dev/null
+++ b/tests/rustdoc-ui/synthetic-auto-trait-impls/lifetime-generic-user-impl.rs
@@ -0,0 +1,11 @@
+// We used to ICE here while trying to synthesize auto trait impls.
+// issue: 123370
+//@ check-pass
+
+pub struct Inner<'a, Q>(&'a (), Q);
+
+pub struct Outer<'a, Q>(Inner<'a, Q>);
+
+impl<'a, Q: Trait<'a>> std::marker::Unpin for Inner<'static, Q> {}
+
+pub trait Trait<'a> {}