error: expected `,` --> $DIR/catchers.rs:6:25 | 6 | let _ = catchers![a b]; //~ ERROR expected | ^ error: expected identifier --> $DIR/catchers.rs:8:26 | 8 | let _ = catchers![a::, ]; //~ ERROR expected identifier | ^ error: unexpected end of input, expected identifier --> $DIR/catchers.rs:9:13 | 9 | let _ = catchers![a::]; //~ ERROR expected identifier | ^^^^^^^^^^^^^^ in this macro invocation error: aborting due to 3 previous errors