error: absolute paths must start with `self`, `super`, `crate`, or an external crate name in the 2018 edition
  --> $DIR/extern-crate-submod.rs:19:5
   |
LL | use m::edition_lint_paths::foo;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `crate`: `crate::m::edition_lint_paths::foo`
   |
note: lint level defined here
  --> $DIR/extern-crate-submod.rs:9:9
   |
LL | #![deny(absolute_paths_not_starting_with_crate)]
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2018 edition!
   = note: for more information, see issue #53130 <https://github.com/rust-lang/rust/issues/53130>

error: aborting due to previous error