error[E0516]: `typeof` is a reserved keyword but unimplemented
  --> $DIR/issue-100183.rs:2:9
   |
LL |     y: (typeof("hey"),),
   |         ^^^^^^^^^^^^^ reserved keyword
   |
help: consider replacing `typeof(...)` with an actual type
   |
LL -     y: (typeof("hey"),),
LL +     y: (&str,),
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0516`.