error: expected identifier, found `1main`
  --> $DIR/integer-literal-start-ident.rs:1:4
   |
LL | fn 1main() {}
   |    ^^^^^ expected identifier
   |
help: identifiers cannot start with a number
  --> $DIR/integer-literal-start-ident.rs:1:4
   |
LL | fn 1main() {}
   |    ^

error: aborting due to 1 previous error