recovery.txt

16:41:51|~/tmp
λ cat main.rs 
use

fn main() {}

16:42:06|~/tmp
λ rustc +nightly -Z ast-json main.rs
error: expected identifier, found keyword `fn`
 --> main.rs:3:1
  |
3 | fn main() {}
  | ^^ expected identifier, found keyword

error: expected one of `::`, `;`, or `as`, found `main`
 --> main.rs:3:4
  |
3 | fn main() {}
  |    ^^^^ expected one of `::`, `;`, or `as`

error: aborting due to 2 previous errors


16:42:08|~/tmp
λ ~/projects/rust-analyzer/target/release/ra_cli parse < main.rs 
SOURCE_FILE@[0; 18)
  USE_ITEM@[0; 3)
    USE_KW@[0; 3) "use"
  WHITESPACE@[3; 5) "\n\n"
  FN_DEF@[5; 17)
    FN_KW@[5; 7) "fn"
    WHITESPACE@[7; 8) " "
    NAME@[8; 12)
      IDENT@[8; 12) "main"
    PARAM_LIST@[12; 14)
      L_PAREN@[12; 13) "("
      R_PAREN@[13; 14) ")"
    WHITESPACE@[14; 15) " "
    BLOCK_EXPR@[15; 17)
      BLOCK@[15; 17)
        L_CURLY@[15; 16) "{"
        R_CURLY@[16; 17) "}"
  WHITESPACE@[17; 18) "\n"