error[E0426]: use of undeclared label `'label_use`
  --> $DIR/gen-macro-rules-hygiene.rs:12:1
   |
LL | gen_macro_rules!();
   | ^^^^^^^^^^^^^^^^^^ undeclared label `'label_use`
...
LL |         generated!();
   |         ------------ in this macro invocation
   |
   = note: this error originates in the macro `generated` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find value `local_use` in this scope
  --> $DIR/gen-macro-rules-hygiene.rs:12:1
   |
LL | gen_macro_rules!();
   | ^^^^^^^^^^^^^^^^^^ help: a local variable with a similar name exists: `local_def`
...
LL |         generated!();
   |         ------------ in this macro invocation
   |
   = note: this error originates in the macro `generated` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find value `local_def` in this scope
  --> $DIR/gen-macro-rules-hygiene.rs:21:9
   |
LL |         local_def;
   |         ^^^^^^^^^ help: a local variable with a similar name exists: `local_use`

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0425, E0426.
For more information about an error, try `rustc --explain E0425`.