1 files changed, 10 insertions, 0 deletions

diff --git a/src/test/ui/issues/auxiliary/issue-4208-cc.rs b/src/test/ui/issues/auxiliary/issue-4208-cc.rs
new file mode 100644
index 000000000..7b4c8b01a
--- /dev/null
+++ b/src/test/ui/issues/auxiliary/issue-4208-cc.rs
@@ -0,0 +1,10 @@
+#![crate_name="numeric"]
+#![crate_type = "lib"]
+
+pub trait Trig<T> {
+    fn sin(&self) -> T;
+}
+
+pub fn sin<T:Trig<R>, R>(theta: &T) -> R { theta.sin() }
+
+pub trait Angle<T>: Trig<T> {}