LMMS freeze when adding instruments or moving mixer tracks

[rawthought]

Hi there,
I have a bug with the actual "stable-1.1" branch build
It happend when i drag and drop instruments from the left pannel or when I move a mixer track while the song is playing
The sound cut, and LMMS is freezed, i can't even quit it with the window cross.

here is what my terminal is saying ;

~$ /opt/lmms-stable-1.1/bin/lmms
Connection established.

Stream successfully created

MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
called Track::getTCO( 18 ), but TCO 18 doesn't exist
QObject: Cannot create children for a parent that is in a different thread.
(Parent is InstrumentTrack(0x7f429e7d35a0), parent's thread is QThread(0x10f5f80), current thread is QThread(0x1cb1bd0)

My OS is "Debian Wheezy"

[tresf]

Are you sure this is stable-1.1? MemoryManager shouldn't be in that branch yet as we haven't put it through regression testing yet.

[diizy]

On 11/26/2014 12:52 AM, rawthought wrote:

Hi there,
I have a bug with the actual "stable-1.1" branch build
It happend when i drag and drop instruments from the left pannel or
when I move a mixer track while the song is playing
The sound cut, and LMMS is freezed, i can't even quit it with the
window cross.

here is what my terminal is saying ;

~$ /opt/lmms-stable-1.1/bin/lmms
Connection established.

Stream successfully created

MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted
MemoryManager: Null pointer deallocation attempted

That's master branch, not 1.1

[rawthought]

Oo
ok
i must have made a mistake somewhere

[tresf]

No worries... The bug may still be valid, so I've filed it for 1.2, since 1.2 will generously receive the new MemoryManager! :)

[curlymorphic]

I think this is the same bug. Where lmms sometimes locks up when adding instruments, while playing.

Some instruments seem to be more prone than others, and some i cant get to crash

AudioFilePlayer, Vestige(with no vst) , vibed and wacom, and zynaddsubfx I could not get to crash, with approx 300 tries on each one,

SF2 player crashed nearly every try, my test results were 1,1,1,1,2,1,1,1,2,1,1,1,1,1,1,2,1, this one could segfault sf2_player.cpp line 652. or hang in a loop header.h 515 lock().

all the remaining synths hang in a loop in header.h line 515 lock(). usually within 30 attempts.

I will come back to this, but need a break from dragging synths out :)

[diizy]

Ok cool, you can work on this one.

[badosu]

Great @curlymorphic I noticed this happening some times but when I went on to make it intentionally it was so difficult :/

[tresf]

Interested especially in the SF2 problem because it is a problem on apple and crashes 50% of the time regardless of whether playback is occurring or not per #649

[curlymorphic]

The sf2 problem is a separate bug from the one this pull request addresses. And im not convinced it is the same as the apple bug, because this one causes a hard crash, SEGFAULT's iirc. Not sure if the sf2 crashing on loading while playing on linux should have a separate bug report. I will Try to look into it later today.
.

[tresf]

The sf2 problem is a separate bug from the one this pull request addresses. And im not convinced it is the same as the apple bug, because this one causes a hard crash, SEGFAULT's iirc. Not sure if the sf2 crashing on loading while playing on linux should have a separate bug report. I will Try to look into it later today.

Confirmed. Apple still crashes after this patch. 😕

[tresf]

Closed via #1519. If this bug comes back, please reopen this bug report!