1error: invalid fragment specifier `foo`
2  --> $DIR/macro-invalid-fragment-spec.rs:2:6
3   |
4LL |     ($x:foo) => ()
5   |      ^^^^^^
6   |
7   = help: valid fragment specifiers are `ident`, `block`, `stmt`, `expr`, `pat`, `ty`, `lifetime`, `literal`, `path`, `meta`, `tt`, `item` and `vis`
8
9error: aborting due to previous error
10
11