1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/regions/regions-fn-subtyping-2.rs b/src/test/ui/regions/regions-fn-subtyping-2.rs
new file mode 100644
index 000000000..83949ddba
--- /dev/null
+++ b/src/test/ui/regions/regions-fn-subtyping-2.rs
@@ -0,0 +1,20 @@
+// run-pass
+#![allow(dead_code)]
+// Issue #2263.
+
+// Here, `f` is a function that takes a pointer `x` and a function
+// `g`, where `g` requires its argument `y` to be in the same region
+// that `x` is in.
+// pretty-expanded FIXME #23616
+
+fn has_same_region(f: Box<dyn for<'a> FnMut(&'a isize, Box<dyn FnMut(&'a isize)>)>) {
+    // `f` should be the type that `wants_same_region` wants, but
+    // right now the compiler complains that it isn't.
+    wants_same_region(f);
+}
+
+fn wants_same_region(_f: Box<dyn for<'b> FnMut(&'b isize, Box<dyn FnMut(&'b isize)>)>) {
+}
+
+pub fn main() {
+}