1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/traits/trivial_impl4.rs b/tests/ui/traits/trivial_impl4.rs
new file mode 100644
index 000000000..518f159c1
--- /dev/null
+++ b/tests/ui/traits/trivial_impl4.rs
@@ -0,0 +1,21 @@
+//! Check that we don't break orphan rules.
+//! The dependency may add an impl for `u8` later,
+//! which would break this crate. We want to avoid adding
+//! more ways in which adding an impl can be a breaking change.
+//! This test differs from `trivial_impl3` because there actually
+//! exists any impl for `Trait`, which has an effect on coherence.
+
+// aux-build:trivial4.rs
+
+extern crate trivial4;
+
+pub trait Foo {
+    fn foo()
+    where
+        Self: trivial4::Trait;
+}
+
+impl Foo for u8 {}
+//~^ ERROR not all trait items implemented, missing: `foo`
+
+fn main() {}