Re: :alnum: broken?

[Andreas Schwab <schwab@suse.de>]

On Feb 26 2020, Mattias Engdegård wrote:

> @@ -2000,6 +2002,23 @@ regex_compile (re_char *pattern, ptrdiff_t size,
>  
>  	    laststart = b;
>  
> +            /* Check for the mistake of forgetting the extra square brackets,
> +               as in "[:alpha:]".  */
> +            if (*p == ':')
> +              {
> +                re_char *q = p + 1;
> +                while (q != pend && *q != ']')
> +                  {
> +                    if (*q == ':')
> +                      {
> +                        if (q + 1 != pend && q[1] == ']' && q > p + 1)
> +                          FREE_STACK_RETURN (REG_ECLASSBR);
> +                        break;
> +                      }
> +                    q++;
> +                  }
> +              }
> +

That would break "[:[:alpha:]]".

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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