Review Request 117345: Fix crash in KIO due to exposing inconsistent views of internal data.

[Simeon Bird]

> On April 20, 2015, 7:08 a.m., David Faure wrote:
> > Should be committed to kdelibs4 indeed. Preferrably with the unittest improvements that you wrote for KF5.
> > 
> > Sorry for the delay before I reviewed it.

No problem - the bug's been there for several years so a few more months won't hurt :)
I'll commit it with the unit test once I've checked it compiles and passes.


- Simeon


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On Dec. 19, 2014, 6:50 p.m., Simeon Bird wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/117345/
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> 
> (Updated Dec. 19, 2014, 6:50 p.m.)
> 
> 
> Review request for kdelibs.
> 
> 
> Repository: kdelibs
> 
> 
> Description
> -------
> 
> Fix crash in KIO due to exposing inconsistent views of internal data.
> 
> This can be triggered by renaming a directory while one of the files in it is open in gwenview.
> 
> It occurs because when KDirListerCache::emitRedirections is called,
> itemsInUse contains the old url. However, KDirLister::Private::redirect
> changes lstDirs to the new url. Thus at this point lstDirs contains an
> item not in itemsInUse, which causes an assertion if forgetDirs is
> called.
> 
> In gwenview, the redirection signal is connected to openURL. This calls
> forgetDirs, and causes the assertion.
> 
> The solution: update itemsInUse *before* emitting redirections.
> 
> This fixes the crash, but gwenview opens the first file in
> the new directory instead of the file open before renaming. 
> This is probably an unrelated gwenview bug.
> 
> I wrote this for kdelibs 4, but the code seems unchanged in kdelibs 5.
> 
> 
> Diffs
> -----
> 
>   kio/kio/kdirlister.cpp aad6893f47eba81c3f78ed1ca7327adf6fb587bb 
> 
> Diff: https://git.reviewboard.kde.org/r/117345/diff/
> 
> 
> Testing
> -------
> 
> It fixes the crash! It might break something else.
> 
> 
> Thanks,
> 
> Simeon Bird
> 
>

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