46523_x86_64 Deskbar Crash on Boot

[vidrep]

46523_x86_64 CD image install: Deskbar crashes after booting, and will continue crashing every time it is restarted. Intermittently, when selecting "save debug report", mouse loses select function. Can be restored with keyboard "alt, ctrl,del", select "kill debugger". Mouse select returns, and blank debug report appears on desktop.

[anevilyak]

Did that behavior start with a particular revision?

[vidrep]

It started with 46523.

[vidrep]

Only 46523_x86_64 is exhibiting this behaviour.

[pulkomandy]

Could you try running it with libroot_debug?

[vidrep]

Opening a terminal and entering "LD_PRELOAD=libroot_debug.so Deskbar" brings up the Deskbar Preferences, and then it crashes.

[diver]

The last crash might be related to hrev46520.

[anevilyak]

Indeed. As a corroborating point, quitting media_server and then attempting to start Deskbar allows the latter to successfully launch here.

[siarzhuk]

Could you, please recheck with hrev46516 nightly the following:

• move the mouse pointer above the replicant to let the notify tooltip be shown;
• try to change volume with the mouse wheel;
• is volume control from the replicant popup menu functional?

Thanks.

[vidrep]

I installed 46516_x86_64 anyboot image. When the mouse pointer is moved above the volume control replicant the deskbar crashes and a debug dialog comes up before any pop-up menu appears.Debug report attached.

[siarzhuk]

Hm... Deskbar-478-debug-13-12-2013-06-51-59.report​ is looking like binary format. :-\ Is something wrong with it?

Looks like the problem has existed before hrev46520. The hrev46520 just introduced polling of media server for state of mixer mute control. The replicant's view Pulse() call uses the MixerControl in the same way as in tooltip hover implementation. The issue at boot can be workarounded by disabling pool at start - but replicant hover will obviously crash the Deskbar.

[vidrep]

Usually the debug report is a 0 byte file when the deskbar crashes and a report is created. Deskbar-478-debug-13-12-2013-06-51-59 report that I attached is a copy. I'll send the original from my Haiku PC when I go home tonight. It was in readable form on my Alpha 4.1 partition.

[anevilyak]

Replying to siarzhuk:

Looks like the problem has existed before hrev46520. The hrev46520 just introduced polling of media server for state of mixer mute control. The replicant's view Pulse() call uses the MixerControl in the same way as in tooltip hover implementation. The issue at boot can be workarounded by disabling pool at start - but replicant hover will obviously crash the Deskbar.

Interesting that whatever goes wrong only does so if it's actually able to attempt to poll though. As stated, with media_server shut down, it doesn't crash, though one sees the constant polling attempts on the console. It should further be noted that the crash only actually occurs after some messages on the terminal about being unable to instantiate a parameter web (I unfortunately don't have access to that computer for a few more hours, and can't recall the exact message right now).

[anevilyak]

Crash fixed in hrev46536. The question of why unflattening the parameter web in question fails still remains though, as it does in fact get a response back from the media_server with flattened data. My knowledge of the media kit is limited though, so I'll leave that to someone more knowledgable.

[vidrep]

Attached debug report to replace earlier corrupted file.

[axeld]

It could be just a long vs. int32 issue, or something similar. Maybe even some pointer arithmetic. In any case, it deserves its own ticket.

[vidrep]

Installed 46537_x86_64. When mouse pointer is above volume control replicant, tooltip is shown, but no function when using mouse wheel to change volume. It does work on 46537_gcc2 nightly. When shutdown "restart system" it gets to media server and crashes deskbar. Save report from debug dialog. Restart deskbar and 0 byte debug report appears on desktop.

[anevilyak]

Please file a new ticket for that, as it's a different problem from the one this ticket was filed for.