1 files changed, 7 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-58857.rs b/tests/ui/issues/issue-58857.rs
new file mode 100644
index 000000000..4350d7e5b
--- /dev/null
+++ b/tests/ui/issues/issue-58857.rs
@@ -0,0 +1,7 @@
+struct Conj<A> {a : A}
+trait Valid {}
+
+impl<A: !Valid> Conj<A>{}
+//~^ ERROR negative bounds are not supported
+
+fn main() {}