error: expected identifier, found keyword `for`
  --> $DIR/keyword-for-as-identifier.rs:4:9
   |
LL |     let for = "foo";
   |         ^^^ expected identifier, found keyword
   |
help: escape `for` to use it as an identifier
   |
LL |     let r#for = "foo";
   |         ++

error: aborting due to previous error