[tests] Add passing test

Closes #3683

1 files changed, 16 insertions, 0 deletions

diff --git a/src/test/run-pass/issue-3683.rs b/src/test/run-pass/issue-3683.rs
new file mode 100644
index 00000000000..bff9f054a93
--- /dev/null
+++ b/src/test/run-pass/issue-3683.rs
@@ -0,0 +1,16 @@
+trait Foo {
+    fn a() -> int;
+    fn b() -> int {
+        self.a() + 2
+    }
+}
+
+impl int: Foo {
+    fn a() -> int {
+        3
+    }
+}
+
+fn main() {
+    assert(3.b() == 5);
+}