Hello Tjeerd, sorry for the delay. I would have expected more output from catchsegv.
I guess the first valgrind run would have been better placed in an attachement too. The file audacity_coredumps.log points to libzynaddsubfx_dssi.so that belongs to package zynaddsubfx-dssi. That seems to be involved in the crash at least. I guess this package is installed on purpose on your system? If not uninstalling could be a workaround. As I just tried to help triaging this issue and being not involved in packaging I have not enough knowledge how to setup a system to get this file loaded by audacity. Therefore probably you could add what needs to be done from a fresh installed system to reach a setup similar to yours. And please add the output of following: dpkg -l | grep -i -E "audacity|jack|zynaddsubfx" Kind regards, Bernhard Backtrace from audacity_coredumps.log what it should look like with debug symbols installed: Stack trace of thread 11485: #0 0x00007f94d6a507bb __GI_raise (libc.so.6) #1 0x00007f94d6a3b535 __GI_abort (libc.so.6) #2 0x00007f94d6a92508 __libc_message (libc.so.6) #3 0x00007f94d6a98c1a malloc_printerr (libc.so.6) #4 0x00007f94d6a9a5d7 _int_free (libc.so.6) #5 0x00007f94cacf6f3d in __gnu_cxx::new_allocator<char>::deallocate(char*, unsigned long) at /usr/include/c++/7/ext/new_allocator.h:125 in zyn::Bank::addtobank(int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) #6 0x00007f94cacf88a1 in zyn::Bank::loadbank(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) at ./src/Misc/Bank.cpp:267 #7 0x00007f94cad4029c in zyn::MiddleWareImpl::loadPendingBank(int, zyn::Bank&) at ./src/Misc/MiddleWare.cpp:477 #8 0x00007f94cade20ea in std::function<void (char const*, rtosc::RtData&)>::operator()(char const*, rtosc::RtData&) const at /usr/include/c++/7/bits/std_function.h:706 in rtosc::Ports::dispatch(char const*, rtosc::RtData&, bool) #9 0x00007f94cad42959 in zyn::MiddleWareImpl::bToUhandle(char const*) at ./src/Misc/MiddleWare.cpp:1905 #10 0x00007f94cad42cbf in zyn::MiddleWareImpl::tick() at ./src/Misc/MiddleWare.cpp:698 #11 0x00007f94cacf43fd in DSSIaudiooutput::<lambda()>::operator() at ./src/Output/DSSIaudiooutput.cpp:635 #12 0x00007f94d6e32b2f n/a (libstdc++.so.6) #13 0x00007f94d6f0efa3 in start_thread (arg=<optimized out>) at pthread_create.c:486 #14 0x00007f94d6b124cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 https://sources.debian.org/src/zynaddsubfx/3.0.3-1/src/Misc/Bank.cpp/#L506 https://sources.debian.org/src/zynaddsubfx/3.0.3-1/src/Misc/Bank.cpp/#L267