1 files changed, 36 insertions, 0 deletions
diff --git a/tests/ui/traits/bug-7183-generics.rs b/tests/ui/traits/bug-7183-generics.rs
new file mode 100644
index 000000000..f53a17361
--- /dev/null
+++ b/tests/ui/traits/bug-7183-generics.rs
@@ -0,0 +1,36 @@
+// run-pass
+
+trait Speak : Sized {
+    fn say(&self, s:&str) -> String;
+    fn hi(&self) -> String { hello(self) }
+}
+
+fn hello<S:Speak>(s:&S) -> String{
+    s.say("hello")
+}
+
+impl Speak for isize {
+    fn say(&self, s:&str) -> String {
+        format!("{}: {}", s, *self)
+    }
+}
+
+impl<T: Speak> Speak for Option<T> {
+    fn say(&self, s:&str) -> String {
+        match *self {
+            None => format!("{} - none", s),
+            Some(ref x) => { format!("something!{}", x.say(s)) }
+        }
+    }
+}
+
+
+pub fn main() {
+    assert_eq!(3.hi(), "hello: 3".to_string());
+    assert_eq!(Some(Some(3)).hi(),
+               "something!something!hello: 3".to_string());
+    assert_eq!(None::<isize>.hi(), "hello - none".to_string());
+
+    assert_eq!(Some(None::<isize>).hi(), "something!hello - none".to_string());
+    assert_eq!(Some(3).hi(), "something!hello: 3".to_string());
+}