Re: segfault when reverse merging in trunk

On 15.03.2013 18:59, Paul Burba wrote:
> On Fri, Mar 15, 2013 at 1:52 PM, Stefan Küng <tortoisesvn_at_gmail.com> wrote:
>> On 15.03.2013 18:46, Paul Burba wrote:
>>>
>>> On Fri, Mar 15, 2013 at 1:23 PM, Stefan Küng <tortoisesvn_at_gmail.com>
>>> wrote:
>>>>
>>>> Hi,
>>>>
>>>> using a build from todays trunk:
>>>>
>>>> $ svn co http://tortoisesvn.googlecode.com/svn/trunk/contrib/diff-scripts
>>>> wc
>>>> $ cd wc
>>>> $ svn merge -r23995:23994
>>>>
>>>> http://tortoisesvn.googlecode.com/svn/trunk/contrib/diff-scripts/diff-doc.js
>>>> diff-doc.js
>>>>
>>>> this segfaults in libsvn_client/merge.c, line 7407 because 'merge_target'
>>>> is
>>>> NULL.
>>>
>>>
>>> Hi Stefan,
>>>
>>> I cannot replicate this with ^/subversion/trunk_at_1457030. Exactly what
>>> revision are you building?
>>>
>>> C:\SVN>svn --version
>>> svn, version 1.8.0-dev (under development)
>>> compiled Mar 14 2013, 16:57:07 on x86/x86_64-microsoft-windows6.1.7601
>>>
>>> Copyright (C) 2013 The Apache Software Foundation.
>>> This software consists of contributions made by many people;
>>> see the NOTICE file for more information.
>>> Subversion is open source software, see http://subversion.apache.org/
>>>
>>> The following repository access (RA) modules are available:
>>>
>>> * ra_svn : Module for accessing a repository using the svn network
>>> protocol.
>>> - handles 'svn' scheme
>>> * ra_local : Module for accessing a repository on local disk.
>>> - handles 'file' scheme
>>> * ra_serf : Module for accessing a repository via WebDAV protocol using
>>> serf.
>>> - handles 'http' scheme
>>> - handles 'https' scheme
>>>
>>>
>>> C:\SVN>svn co
>>> http://tortoisesvn.googlecode.com/svn/trunk/contrib/diff-scripts
>>> wc
>>> A wc\diff-sxw.vbs
>>> A wc\diff-ppt.js
>>> A wc\diff-odt.vbs
>>> A wc\diff-doc.js
>>> A wc\diff-xls.js
>>> A wc\diff-dll.vbs
>>> A wc\merge-ods.vbs
>>> A wc\Readme.txt
>>> A wc\merge-doc.js
>>> A wc\diff-nb.vbs
>>> U wc
>>> Checked out revision 23999.
>>>
>>> C:\SVN>cd wc
>>>
>>> C:\SVN\wc>svn merge -r23995:23994
>>>
>>> http://tortoisesvn.googlecode.com/svn/trunk/contrib/diff-scripts/diff-doc.js
>>> diff-doc.js
>>> --- Reverse-merging r23995 into 'diff-doc.js':
>>> C diff-doc.js
>>> --- Recording mergeinfo for reverse merge of r23995 into 'diff-doc.js':
>>> G diff-doc.js
>>> --- Eliding mergeinfo from 'diff-doc.js':
>>> U diff-doc.js
>>> Summary of conflicts:
>>> Text conflicts: 1
>>> Conflict discovered in file 'diff-doc.js'.
>>> Select: (p) postpone, (df) diff-full, (e) edit, (m) merge,
>>> (mc) mine-conflict, (tc) theirs-conflict, (s) show all options: p
>>
>>
>> Ups, sorry about that. There were some commits to that folder in the mean
>> time, so it doesn't crash anymore with this merge command.
>>
>> Try this instead:
>> $ svn merge -r24000:23999
>> http://tortoisesvn.googlecode.com/svn/trunk/contrib/diff-scripts/diff-xls.js
>> diff-xls.js
>>
>> seems you have to reverse-merge the latest revision.
>
> Hmmm, I still can't replicate:
[snip]
> C:\SVN\diff-scripts-1.8-dev>svn merge -r24000:23999
> http://tortoisesvn.googlecode.com/svn/trunk/contrib/diff-scripts/diff-xls.js
> diff-xls.js

Argh! I forgot the --ignore-ancestry flag: you have to pass
--ignore-ancestry when merging, then it will crash.

Stefan

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