1 files changed, 7 insertions, 0 deletions
diff --git a/tests/ui/cycle-trait/cycle-trait-supertrait-direct.rs b/tests/ui/cycle-trait/cycle-trait-supertrait-direct.rs
new file mode 100644
index 00000000000..e6ab2c790d6
--- /dev/null
+++ b/tests/ui/cycle-trait/cycle-trait-supertrait-direct.rs
@@ -0,0 +1,7 @@
+// Test a supertrait cycle where a trait extends itself.
+
+trait Chromosome: Chromosome {
+    //~^ ERROR cycle detected
+}
+
+fn main() { }