1 files changed, 19 insertions, 0 deletions
diff --git a/src/test/ui/traits/early-vtbl-resolution.rs b/src/test/ui/traits/early-vtbl-resolution.rs
new file mode 100644
index 000000000..f4b69c140
--- /dev/null
+++ b/src/test/ui/traits/early-vtbl-resolution.rs
@@ -0,0 +1,19 @@
+// run-pass
+
+#![allow(non_camel_case_types)]
+#![allow(dead_code)]
+// pretty-expanded FIXME #23616
+
+trait thing<A> {
+    fn foo(&self) -> Option<A>;
+}
+impl<A> thing<A> for isize {
+    fn foo(&self) -> Option<A> { None }
+}
+fn foo_func<A, B: thing<A>>(x: B) -> Option<A> { x.foo() }
+
+struct A { a: isize }
+
+pub fn main() {
+    let _x: Option<f64> = foo_func(0);
+}