warning: `$crate` may not be imported --> $DIR/import-crate-var.rs:7:5 | LL | m!(); | ^^^^^ | = note: `use $crate;` was erroneously allowed and will become a hard error in a future release = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)