[Bug 18006] Mp3tag: Crash when using Tag Sources feature

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=18006





--- Comment #9 from the_unknown at gmx.net  2009-06-07 16:07:02 ---
(In reply to comment #8)
> Unfortunately this doesn't bring new information for me cause test was written
> exactly about it. If I understand him right we are talking about
> LVM_INSERTCOLUMN message which he (author) doesn't send. That's how I got a
> phrase:
> ---
> when there is at least one column to display text
> ---
> means "I've sent LVM_INSERTCOLUMN at least once".
> 
> If it means something else please let me know.
> 

Reply from Mp3Tag author:
> OK, I've installed Ubuntu with Wine 1.1.23 to try it by myself.
> 
> The error occurs because the listview gets the LVN_GETDISPINFO message after
> an item was added even if the listview does not contain any columns at this
> point (that means LVM_INSERTCOLUMN hasn't been sent). My application adds
> columns dynamically and uses a map from column indexes to a data structure
> containing the actual item texts to retrieve the texts. In this case, the map
> was empty (no columns) but was accessed at the 0 index in the LVN_GETDISPINFO
> handler (which caused the crash). This only happened under Wine because the
> LVN_GETDISPINFO message was not sent on native Windows.
> 
> However, I've tried to create a sample test application which shows this
> different behaviour. Unfortunately, I can't reproduce it, because in the
> LVN_GETDISPINFO message gets sent on both native Windows and Wine. So it
> seems that the bug was indeed with Mp3tag but only showed up when running
> under Wine.
> 
> Sorry for the false alarm.

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