error: no rules expected `[` --> $DIR/macro-doc-comments-2.rs:6:5 | LL | macro_rules! inner { | ------------------ when calling this macro ... LL | /// Outer | ^^^^^^^^^ | | | no rules expected this token in macro call | outer doc comments expand to `#[doc = "..."]`, which is what this macro attempted to match | note: while trying to match `!` --> $DIR/macro-doc-comments-2.rs:2:7 | LL | (#![$inner:meta]) => () | ^ error: aborting due to 1 previous error