--- /dev/null
+error[E0275]: overflow evaluating the requirement `{integer}: Tweedledee`
+ --> $DIR/simultaneous.rs:18:5
+ |
+LL | fn is_ee<T: Combo>(t: T) {
+ | ----- required by this bound in `is_ee`
+...
+LL | is_ee(4);
+ | ^^^^^
+ |
+ = note: required because of the requirements on the impl of `Combo` for `{integer}`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0275`.