warning: function `dead_function` is never used
  --> $DIR/warn-by-default-lint-two-modules.rs:9:8
   |
LL |     fn dead_function() {}
   |        ^^^^^^^^^^^^^
   |
   = note: requested on the command line with `--force-warn dead-code`

warning: function `dead_function` is never used
  --> $DIR/warn-by-default-lint-two-modules.rs:14:8
   |
LL |     fn dead_function() {}
   |        ^^^^^^^^^^^^^

warning: 2 warnings emitted