crash in JackMidiPort.cpp:130

[GoogleCodeExporter]

What steps will reproduce the problem?
1. start AMsynth + an app that generates a lot of midi messages (i used 
qmidiarp with a 'very busy' sequencer pattern at high speed)
2. connect the out of qmidiarp to the in of amsynth
3. let play for a while 

What is the expected output? What do you see instead?
expect AMsynth to keep playing
iso it crashes after some time

What version of the product are you using? On what operating system?
ubuntu 12.04
amsynth 1.4.0-0~606~ubuntu12.04.1 (from your PPA)

Please provide any additional information below.
it seems that this happens only when using the jack midi ports directly
if i use the legacy ALSA midi ports (i connect them in the jack midi tab of 
Qjackctl using a2j) this doesnt happen

it seems to depend a bit on how long amsynth is running and what midi you are 
sending to amsynth
also i see this issue more often when i have multiple instances of AMsynth 
running

if i start AMsynth via terminal this is the output i get when it crashes :

amsynth: ../common/JackMidiPort.cpp:130: void Jack::MidiBufferMixdown(void*, 
void**, int, jack_nframes_t): Assertion `next_event != 0' failed.
Aborted (core dumped)

can seem to find that core dump file??
i'll get back to you if i do

grtz
Thijs

Original issue reported on code.google.com by thijsvan...@gmail.com on 15 Jan 2014 at 11:46

[GoogleCodeExporter]

aha got it
(classic ulimit issue :-S)

i had to put the file on my google drive (max is 10Mb here)
link : 
https://drive.google.com/folderview?id=0B1eVS8jzLhY9ankyOXpXeTFHWmc&usp=sharing

Original comment by thijsvan...@gmail.com on 15 Jan 2014 at 12:05

[GoogleCodeExporter]

This seems to be a crash in the jack library.

Someone else has come across it here - 
http://jack-audio.10948.n7.nabble.com/Re-jack2-Client-crash-on-MIDI-mixdown-when
-using-multiple-connections-46-td17494.html

Original comment by nickdowell on 15 Jan 2014 at 12:16

[GoogleCodeExporter]

Original comment by nickdowell on 7 May 2014 at 5:41

• Changed title: crash in JackMidiPort.cpp:130