Reparse fuzz failure (MACRO_CALL)

original:
SOURCE_FILE@0..25
  FN_DEF@0..25
    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 ")"
    BLOCK_EXPR@9..25
      L_CURLY@9..10 "{"
      WHITESPACE@10..12 "\n\t"
      EXPR_STMT@12..14
        PATH_EXPR@12..14
          PATH@12..14
            PATH_SEGMENT@12..14
              NAME_REF@12..14
                IDENT@12..14 "cn"
      COMMENT@14..19 "/////"
      WHITESPACE@19..21 "\n\n"
      MACRO_CALL@21..23
        PATH@21..22
          PATH_SEGMENT@21..22
            NAME_REF@21..22
              IDENT@21..22 "c"
        BANG@22..23 "!"
      WHITESPACE@23..24 "\n"
      R_CURLY@24..25 "}"
reparsed:
SOURCE_FILE@0..23
  FN_DEF@0..23
    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 ")"
    BLOCK_EXPR@9..23
      L_CURLY@9..10 "{"
      WHITESPACE@10..12 "\n\t"
      EXPR_STMT@12..14
        PATH_EXPR@12..14
          PATH@12..14
            PATH_SEGMENT@12..14
              NAME_REF@12..14
                IDENT@12..14 "cn"
      COMMENT@14..17 "///"
      WHITESPACE@17..19 "\n\n"
      MACRO_CALL@19..21
        PATH@19..20
          PATH_SEGMENT@19..20
            NAME_REF@19..20
              IDENT@19..20 "c"
        BANG@20..21 "!"
      WHITESPACE@21..22 "\n"
      R_CURLY@22..23 "}"
full reparse:
SOURCE_FILE@0..23
  FN_DEF@0..23
    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 ")"
    BLOCK_EXPR@9..23
      L_CURLY@9..10 "{"
      WHITESPACE@10..12 "\n\t"
      EXPR_STMT@12..14
        PATH_EXPR@12..14
          PATH@12..14
            PATH_SEGMENT@12..14
              NAME_REF@12..14
                IDENT@12..14 "cn"
      MACRO_CALL@14..21
        COMMENT@14..17 "///"
        WHITESPACE@17..19 "\n\n"
        PATH@19..20
          PATH_SEGMENT@19..20
            NAME_REF@19..20
              IDENT@19..20 "c"
        BANG@20..21 "!"
      WHITESPACE@21..22 "\n"
      R_CURLY@22..23 "}"
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
  left: `"MACRO_CALL@19..21"`,
 right: `"MACRO_CALL@14..21"`: different syntax tree produced by the full reparse'

1.zip

Start with the reparse fuzz failure shown in the issue and inspect the attached 1.zip reproduction. Compare the incremental reparse with the full reparse around the COMMENT and MACRO_CALL nodes; done means both reparses produce the same syntax tree without the assertion panic.