1 files changed, 12 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-4208.rs b/tests/ui/issues/issue-4208.rs
new file mode 100644
index 000000000..3b01811a9
--- /dev/null
+++ b/tests/ui/issues/issue-4208.rs
@@ -0,0 +1,12 @@
+// run-pass
+#![allow(dead_code)]
+// aux-build:issue-4208-cc.rs
+
+// pretty-expanded FIXME #23616
+
+extern crate numeric;
+use numeric::{sin, Angle};
+
+fn foo<T, A:Angle<T>>(theta: A) -> T { sin(&theta) }
+
+pub fn main() {}