1 files changed, 58 insertions, 0 deletions
diff --git a/src/test/ui/threads-sendsync/send_str_treemap.rs b/src/test/ui/threads-sendsync/send_str_treemap.rs
new file mode 100644
index 000000000..4d4631745
--- /dev/null
+++ b/src/test/ui/threads-sendsync/send_str_treemap.rs
@@ -0,0 +1,58 @@
+// run-pass
+use std::collections::BTreeMap;
+use std::borrow::Cow;
+
+use std::borrow::Cow::{Owned as O, Borrowed as B};
+
+type SendStr = Cow<'static, str>;
+
+fn main() {
+    let mut map: BTreeMap<SendStr, usize> = BTreeMap::new();
+    assert!(map.insert(B("foo"), 42).is_none());
+    assert!(map.insert(O("foo".to_string()), 42).is_some());
+    assert!(map.insert(B("foo"), 42).is_some());
+    assert!(map.insert(O("foo".to_string()), 42).is_some());
+
+    assert!(map.insert(B("foo"), 43).is_some());
+    assert!(map.insert(O("foo".to_string()), 44).is_some());
+    assert!(map.insert(B("foo"), 45).is_some());
+    assert!(map.insert(O("foo".to_string()), 46).is_some());
+
+    let v = 46;
+
+    assert_eq!(map.get(&O("foo".to_string())), Some(&v));
+    assert_eq!(map.get(&B("foo")), Some(&v));
+
+    let (a, b, c, d) = (50, 51, 52, 53);
+
+    assert!(map.insert(B("abc"), a).is_none());
+    assert!(map.insert(O("bcd".to_string()), b).is_none());
+    assert!(map.insert(B("cde"), c).is_none());
+    assert!(map.insert(O("def".to_string()), d).is_none());
+
+    assert!(map.insert(B("abc"), a).is_some());
+    assert!(map.insert(O("bcd".to_string()), b).is_some());
+    assert!(map.insert(B("cde"), c).is_some());
+    assert!(map.insert(O("def".to_string()), d).is_some());
+
+    assert!(map.insert(O("abc".to_string()), a).is_some());
+    assert!(map.insert(B("bcd"), b).is_some());
+    assert!(map.insert(O("cde".to_string()), c).is_some());
+    assert!(map.insert(B("def"), d).is_some());
+
+    assert_eq!(map.get(&B("abc")), Some(&a));
+    assert_eq!(map.get(&B("bcd")), Some(&b));
+    assert_eq!(map.get(&B("cde")), Some(&c));
+    assert_eq!(map.get(&B("def")), Some(&d));
+
+    assert_eq!(map.get(&O("abc".to_string())), Some(&a));
+    assert_eq!(map.get(&O("bcd".to_string())), Some(&b));
+    assert_eq!(map.get(&O("cde".to_string())), Some(&c));
+    assert_eq!(map.get(&O("def".to_string())), Some(&d));
+
+    assert!(map.remove(&B("foo")).is_some());
+    assert_eq!(map.into_iter().map(|(k, v)| format!("{}{}", k, v))
+                              .collect::<Vec<String>>()
+                              .concat(),
+               "abc50bcd51cde52def53".to_string());
+}