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Re: "perl: utf8.c:1997: Perl_swash_fetch: Assertion `klen <= sizeof(PL_last_swash_key)'failed." [5.12.1]

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Reverend Chip
November 28, 2010 14:36
Re: "perl: utf8.c:1997: Perl_swash_fetch: Assertion `klen <= sizeof(PL_last_swash_key)'failed." [5.12.1]
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On 11/28/2010 2:31 PM, Nicholas Clark wrote:
> On Sun, Nov 28, 2010 at 02:26:51PM -0800, Reverend Chip wrote:
>> On 11/28/2010 2:34 AM, demerphq wrote:
>>> However if it means we have to validate the string every time we do a
>>> utf8 operation then I would say you are wrong.
>> Slippery slope fallacy.
> Why so?

Because "validate" implies a level of caution that I have never
requested, and never will.  At most I've requested "don't actually
crash" with a side order of "show me where I need to add protective
calls to utf8::validate", which would be satisfied by, for example,
avoiding invalid C pointers caused by bad utf8 and turning any
invalid-utf8-caused asserts to croaks.  As you well know, avoiding
crashes is a much easier job than validation.  Compare the gap in
difficulty between code that parses valid XML correctly, and code that
ensures its input is 100% valid XML.

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