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

error: aborting due to 1 previous error