src/test/ui/feature-gate/issue-43106-gating-of-macro_escape.stderr

warning: macro_escape is a deprecated synonym for macro_use
  --> $DIR/issue-43106-gating-of-macro_escape.rs:18:1
   |
LL | #![macro_escape]
   | ^^^^^^^^^^^^^^^^
   |
   = help: consider an outer attribute, #[macro_use] mod ...