error[E0433]: failed to resolve: use of undeclared crate or module `m`
  --> $DIR/macro_path_as_generic_bound.rs:7:6
   |
LL | foo!(m::m2::A);
   |      ^ use of undeclared crate or module `m`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0433`.