SOURCE_FILE@0..91
  FN@0..89
    FN_KW@0..2 "fn"
    WHITESPACE@2..3 " "
    NAME@3..7
      IDENT@3..7 "main"
    PARAM_LIST@7..9
      L_PAREN@7..8 "("
      R_PAREN@8..9 ")"
    WHITESPACE@9..10 " "
    BLOCK_EXPR@10..89
      L_CURLY@10..11 "{"
      WHITESPACE@11..16 "\n    "
      LET_STMT@16..27
        LET_KW@16..19 "let"
        WHITESPACE@19..20 " "
        IDENT_PAT@20..27
          REF_KW@20..23 "ref"
          WHITESPACE@23..24 " "
          ERROR@24..27
            BOX_KW@24..27 "box"
      WHITESPACE@27..28 " "
      EXPR_STMT@28..35
        BIN_EXPR@28..34
          PATH_EXPR@28..29
            PATH@28..29
              PATH_SEGMENT@28..29
                NAME_REF@28..29
                  IDENT@28..29 "i"
          WHITESPACE@29..30 " "
          EQ@30..31 "="
          WHITESPACE@31..32 " "
          TUPLE_EXPR@32..34
            L_PAREN@32..33 "("
            R_PAREN@33..34 ")"
        SEMICOLON@34..35 ";"
      WHITESPACE@35..40 "\n    "
      LET_STMT@40..51
        LET_KW@40..43 "let"
        WHITESPACE@43..44 " "
        IDENT_PAT@44..51
          MUT_KW@44..47 "mut"
          WHITESPACE@47..48 " "
          ERROR@48..51
            BOX_KW@48..51 "box"
      WHITESPACE@51..52 " "
      EXPR_STMT@52..59
        BIN_EXPR@52..58
          PATH_EXPR@52..53
            PATH@52..53
              PATH_SEGMENT@52..53
                NAME_REF@52..53
                  IDENT@52..53 "i"
          WHITESPACE@53..54 " "
          EQ@54..55 "="
          WHITESPACE@55..56 " "
          TUPLE_EXPR@56..58
            L_PAREN@56..57 "("
            R_PAREN@57..58 ")"
        SEMICOLON@58..59 ";"
      WHITESPACE@59..64 "\n    "
      LET_STMT@64..79
        LET_KW@64..67 "let"
        WHITESPACE@67..68 " "
        IDENT_PAT@68..79
          REF_KW@68..71 "ref"
          WHITESPACE@71..72 " "
          MUT_KW@72..75 "mut"
          WHITESPACE@75..76 " "
          ERROR@76..79
            BOX_KW@76..79 "box"
      WHITESPACE@79..80 " "
      EXPR_STMT@80..87
        BIN_EXPR@80..86
          PATH_EXPR@80..81
            PATH@80..81
              PATH_SEGMENT@80..81
                NAME_REF@80..81
                  IDENT@80..81 "i"
          WHITESPACE@81..82 " "
          EQ@82..83 "="
          WHITESPACE@83..84 " "
          TUPLE_EXPR@84..86
            L_PAREN@84..85 "("
            R_PAREN@85..86 ")"
        SEMICOLON@86..87 ";"
      WHITESPACE@87..88 "\n"
      R_CURLY@88..89 "}"
  WHITESPACE@89..91 "\n\n"
error 24..24: expected a name
error 27..27: expected SEMICOLON
error 48..48: expected a name
error 51..51: expected SEMICOLON
error 76..76: expected a name
error 79..79: expected SEMICOLON