lexer.c:3431: possible array index out of range ?

[dcb314]

[lexer.c:3431]: (style) Array index 'start' is used before limits check.

        while (TY_(IsWhite)(lexer->lexbuf[start]) && start < len)

Suggest sanity check array index before use.

[sthen]

Yep - see https://github.com/htacg/tidy-html5/issues/217