warning: unused variable: `x`
  --> $DIR/expect_lint_from_macro.rs:9:13
   |
LL |         let x = 0;
   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
...
LL |     trigger_unused_variables_macro!();
   |     --------------------------------- in this macro invocation
   |
note: the lint level is defined here
  --> $DIR/expect_lint_from_macro.rs:5:9
   |
LL | #![warn(unused_variables)]
   |         ^^^^^^^^^^^^^^^^
   = note: this warning originates in the macro `trigger_unused_variables_macro` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: unused variable: `x`
  --> $DIR/expect_lint_from_macro.rs:9:13
   |
LL |         let x = 0;
   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
...
LL |     trigger_unused_variables_macro!();
   |     --------------------------------- in this macro invocation
   |
   = note: this warning originates in the macro `trigger_unused_variables_macro` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: 2 warnings emitted