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Re: [perl #129038] Assertion Failure: *Perl_pp_subst *pp_hot.c:3203)

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From:
Karl Williamson
Date:
August 24, 2016 15:09
Subject:
Re: [perl #129038] Assertion Failure: *Perl_pp_subst *pp_hot.c:3203)
Message ID:
0a6af820-9f69-93a1-51ba-6f80761ddebf@khwilliamson.com
On 08/24/2016 08:28 AM, Dave Mitchell wrote:
> On Sun, Aug 21, 2016 at 05:27:55PM -0700, Father Chrysostomos via RT wrote:
>> On Sun Aug 21 15:20:17 2016, brian.carpenter@gmail.com wrote:
>>> The attached script triggers an assertion failure in v5.25.5 (v5.25.4-
>>> 5-g92d73bf).
>>>
>>> ./perl test610
>>> perl: pp_hot.c:3203: OP *Perl_pp_subst(): Assertion `strend >= s'
>>> failed.
>>> Aborted
>>
>> Some locale bug, apparently:
>>
>> $ ./miniperl -e '$_="\xff"; s/\w//l'
>> Assertion failed: (strend >= s), function Perl_pp_subst, file pp_hot.c, line 3203.
>
> The problem is this in S_regmatch:
>
>         case POSIXL:    /* \w or [:punct:] etc. under /l */
>
>             ...
>
>             /* Here, must be utf8 */
>             locinput += UTF8SKIP(locinput);
>             break;
>
> AFAIKT, assuming at that point that the string is utf8, is incorrect.
> Karl, this bit of code was was last touched by you, fancy having a look?
>

ok

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