error: cannot find macro `m!` in this scope
  --> $DIR/issue-40845.rs:14:10
   |
LL | impl S { m!(); } //~ ERROR cannot find macro `m!` in this scope
   |          ^

error: cannot find macro `m!` in this scope
  --> $DIR/issue-40845.rs:11:11
   |
LL | trait T { m!(); } //~ ERROR cannot find macro `m!` in this scope
   |           ^

error: aborting due to 2 previous errors