# Re: another segfault during update

From: Stefan Küng <tortoisesvn_at_gmail.com>
Date: Thu, 26 Mar 2009 21:02:55 +0100

Yes, r36689 seems to fix the cause of the problem.
But: there will be a lot of corrupted working copies lying around, and
these will cause the same segfaults again.

How about adding a check for target_entry being NULL and if it is return
an error message telling the user to do a fresh checkout?

I really don't like segfaults if the root cause is known.

Stefan

Greg Stein wrote:
> I think that might be related to a bug I found right as 1.6.0 was
> going out the door. Take a look at r36686, and see if that fixes
>
> (and r36689 for a test; these have been applied to 1.6.1 already, I believe)
>
> Cheers,
> -g
>
> On Thu, Mar 26, 2009 at 19:14, Stefan Küng <tortoisesvn_at_gmail.com> wrote:
>> Hi,
>>
>> In libsvn_wc\crop.c, line 294 (function svn_wc_crop_tree), the
>> target_entry pointer is NULL.
>>
>> I already got four crash dumps from different people with this segfault.
>> I assume the pointer is NULL because the call in the previous line to
>> apr_hash_get can't find the entry.
>>
>> Unfortunately, the crash dumps don't tell much. All I can see is that
>> the update is on a 'normal' local path (i.e., no UNC path, no non-ascii
>> chars in the path) and the update is done with externals included,
>> allowing unversioned obstruction, depth -1, sticky depth.
>> The url also doesn't seem special (https, no escaping needed since all
>> chars are plain ascii).
>>
>>
>> Maybe someone can find out why this happens?
>>
>>
>> Stefan
>>
>> --
>> ___
>> oo // \\ "De Chelonian Mobile"
>> (_,\/ \_/ \ TortoiseSVN
>> \ \_/_\_/> The coolest Interface to (Sub)Version Control
>> /_/ \_\ http://tortoisesvn.net
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