Re: [Qtractor-devel] Crash when switching plugin chooser window from LV2 to VST

[Rui N. C. <rn...@rn...>]

On 01/03/2016 12:22 AM, Frank Neumann wrote:
>
> Hi all, happy new year to the world,
>
> I have encountered a (mostly reproducible) crash in qtractor, version 0.7.3.
> Situation: I have a couple of LV2 and VST plugins on my system, with the VST
> plugins (u-he's Linux ports of their instruments&effects - Diva, Hive etc; a
> total of 13 plugins) installed in ~/.vst/ (just symlinks) resp. ~/.u-he/ (physical
> locations of plugins).
>
> Process to reproduce the crash:
> - Start qjackctl/jackd.
> - Start qtractor
> - Track->New, type MIDI
> - In Mixer window in the new track, right mouse button and "Add plugin"
> - In plugin chooser, switch to "LV2" plugins, select and add (in my case) "Calf Organ" plugin
> - Again, in mixer window in that track, right mouse button and "Add plugin" again
> - In plugin chooser, switch to "VST" plugins
> --> Boom:
> *** Error in `qtractor': free(): invalid pointer: 0x00007f6ab3519c60 ***
> Aborted
>
> I rebuilt qtractor with --enable-debug and then ran it through gdb; below is
> some extra output from that session.
>
> The u-he plugins were taken from http://www.kvraudio.com/forum/viewtopic.php?f=31&t=424953,
> and I have the most current version (build 3965) on my system.
>
> Rui, did you (or anyone else) ever run across this?
>
> I have noticed that if I remove some of the symlinks from ~/.vst, qtractor will
> at some point not complain anymore (but on quitting it, I get a coredump); if I
> continue to remove more plugins, at some point it will also behave fine on
> quitting. Not sure if this is related to an individual VST plugin or their plain
> amount that is getting scanned/interrogated by qtractor.
>
>
hi Frank,

yes it's amn old i'm afraid. my best guess it's all about 
non-dummy-VST-scan and u-he Diva was/still is ill behaved on inventory scan.

if you're not trying to search for any VST shell sub-plugins in 
particular (eg. zebra2 et al.) you're better turning the dummy-VST-scan 
ON and search again.

hth.

 > Greetings,
 > Frank ("new year resolutions: report more qtractor findings" :-)
 >

happy new year
-- 
rncbc aka. Rui Nuno Capela

ps. btw. is there any news on the lac2016 front?