1 files changed, 32 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-45510.rs b/tests/ui/issues/issue-45510.rs
new file mode 100644
index 000000000..9e104ce6c
--- /dev/null
+++ b/tests/ui/issues/issue-45510.rs
@@ -0,0 +1,32 @@
+// Test overloaded resolution of fn_traits.
+// run-pass
+
+#![feature(fn_traits)]
+#![feature(unboxed_closures)]
+
+#[derive(Debug, PartialEq, Eq)]
+struct Ishmael;
+#[derive(Debug, PartialEq, Eq)]
+struct Maybe;
+struct CallMe;
+
+impl FnOnce<(Ishmael,)> for CallMe {
+    type Output = Ishmael;
+    extern "rust-call" fn call_once(self, _args: (Ishmael,)) -> Ishmael {
+        println!("Split your lungs with blood and thunder!");
+        Ishmael
+    }
+}
+
+impl FnOnce<(Maybe,)> for CallMe {
+    type Output = Maybe;
+    extern "rust-call" fn call_once(self, _args: (Maybe,)) -> Maybe {
+        println!("So we just met, and this is crazy");
+        Maybe
+    }
+}
+
+fn main() {
+    assert_eq!(CallMe(Ishmael), Ishmael);
+    assert_eq!(CallMe(Maybe), Maybe);
+}