error: macro expansion ignores token `let` and any following
  --> $DIR/issue-54441.rs:3:9
   |
LL |         let
   |         ^^^
...
LL |     m!();
   |     ---- caused by the macro expansion here
   |
   = note: the usage of `m!` is likely invalid in foreign item context

error: aborting due to 1 previous error