this is darktable 3.2.1 reporting a segfault: warning: Currently logging to /tmp/darktable_bt_EJL3O0.txt. Turn the logging off and on to make the new setting effective. #0 0x00007f3d85765c3f in wait4 () at /usr/lib/libc.so.6 #1 0x00007f3d8598eb22 in () at /usr/lib/libdarktable.so #2 0x00007f3d856d53e0 in () at /usr/lib/libc.so.6 #3 0x00007f3d2ddaf217 in () at /usr/lib/libigc.so.1 #4 0x00007f3d2ddb0a2a in () at /usr/lib/libigc.so.1 #5 0x00007f3d2dd50c00 in () at /usr/lib/libigc.so.1 #6 0x00007f3d2dd50e5b in () at /usr/lib/libigc.so.1 #7 0x00007f3d2dc3bc10 in () at /usr/lib/libigc.so.1 #8 0x00007f3d2dcd13e8 in () at /usr/lib/libigc.so.1 #9 0x00007f3d2db60934 in () at /usr/lib/libigc.so.1 #10 0x00007f3d2dbb414f in () at /usr/lib/libigc.so.1 #11 0x00007f3d337005d8 in llvm::FPPassManager::runOnFunction(llvm::Function&) () at /usr/lib/libLLVM-10.so #12 0x00007f3d33701bdd in llvm::FPPassManager::runOnModule(llvm::Module&) () at /usr/lib/libLLVM-10.so #13 0x00007f3d33701f70 in llvm::legacy::PassManagerImpl::run(llvm::Module&) () at /usr/lib/libLLVM-10.so #14 0x00007f3d2d9fcdd4 in () at /usr/lib/libigc.so.1 #15 0x00007f3d2d9d6061 in () at /usr/lib/libigc.so.1 #16 0x00007f3d2d8bb994 in () at /usr/lib/libigc.so.1 #17 0x00007f3d2d96ebba in () at /usr/lib/libigc.so.1 #18 0x00007f3d7c2b32ea in () at /usr/lib/intel-opencl/libigdrcl.so #19 0x00007f3d7c0b6d50 in () at /usr/lib/intel-opencl/libigdrcl.so #20 0x00007f3d7c04ea02 in () at /usr/lib/intel-opencl/libigdrcl.so #21 0x00007f3d7d70310e in clBuildProgram () at /usr/lib/libOpenCL.so #22 0x00007f3d85973e48 in dt_opencl_build_program () at /usr/lib/libdarktable.so #23 0x00007f3d859752b3 in () at /usr/lib/libdarktable.so #24 0x00007f3d859790c0 in dt_opencl_init () at /usr/lib/libdarktable.so #25 0x00007f3d858f51ed in dt_init () at /usr/lib/libdarktable.so #26 0x0000560706344037 in () #27 0x00007f3d856c0002 in __libc_start_main () at /usr/lib/libc.so.6 #28 0x000056070634408e in () ========= Id Target Id Frame * 1 Thread 0x7f3d7f387140 (LWP 17613) "darktable" 0x00007f3d85765c3f in wait4 () from /usr/lib/libc.so.6 2 Thread 0x7f3d7f03b700 (LWP 17614) "gmain" 0x00007f3d8578e05f in poll () from /usr/lib/libc.so.6 3 Thread 0x7f3d7e83a700 (LWP 17615) "pool" 0x00007f3d8579371d in syscall () from /usr/lib/libc.so.6 4 Thread 0x7f3d7e039700 (LWP 17616) "gdbus" 0x00007f3d8578e05f in poll () from /usr/lib/libc.so.6 5 Thread 0x7f3d7d574700 (LWP 17617) "worker 0" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 6 Thread 0x7f3d7cd73700 (LWP 17618) "worker 1" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 7 Thread 0x7f3d6ffff700 (LWP 17619) "worker 2" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 8 Thread 0x7f3d6f7fe700 (LWP 17620) "worker 3" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 9 Thread 0x7f3d6effd700 (LWP 17621) "worker 4" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 10 Thread 0x7f3d6e7fc700 (LWP 17622) "worker 5" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 11 Thread 0x7f3d6dffb700 (LWP 17623) "worker 6" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 12 Thread 0x7f3d6d7fa700 (LWP 17624) "worker 7" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 13 Thread 0x7f3d6cff9700 (LWP 17625) "kicker" 0x00007f3d85760571 in clock_nanosleep@GLIBC_2.2.5 () from /usr/lib/libc.so.6 14 Thread 0x7f3d67fff700 (LWP 17626) "worker res 0" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 15 Thread 0x7f3d677fe700 (LWP 17627) "worker res 1" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 16 Thread 0x7f3d66ffd700 (LWP 17628) "worker res 2" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 17 Thread 0x7f3d667fc700 (LWP 17629) "darktable" 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () from /usr/lib/libpthread.so.0 ========= Thread 17 (Thread 0x7f3d667fc700 (LWP 17629)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d82e4bc01 in __gthread_cond_wait (__mutex=, __cond=) at /build/gcc/src/gcc-build/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/gthr-default.h:865 __e = #2 std::condition_variable::wait(std::unique_lock&) (this=, __lock=...) at /build/gcc/src/gcc/libstdc++-v3/src/c++11/condition_variable.cc:53 __e = #3 0x00007f3d7c36620e in () at /usr/lib/intel-opencl/libigdrcl.so #4 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #5 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 16 (Thread 0x7f3d66ffd700 (LWP 17628)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d8599f34e in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 15 (Thread 0x7f3d677fe700 (LWP 17627)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d8599f34e in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 14 (Thread 0x7f3d67fff700 (LWP 17626)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d8599f34e in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 13 (Thread 0x7f3d6cff9700 (LWP 17625)): #0 0x00007f3d85760571 in clock_nanosleep@GLIBC_2.2.5 () at /usr/lib/libc.so.6 #1 0x00007f3d85765e87 in nanosleep () at /usr/lib/libc.so.6 #2 0x00007f3d85765dbe in sleep () at /usr/lib/libc.so.6 #3 0x00007f3d8599eefb in () at /usr/lib/libdarktable.so #4 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #5 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 12 (Thread 0x7f3d6d7fa700 (LWP 17624)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 11 (Thread 0x7f3d6dffb700 (LWP 17623)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 10 (Thread 0x7f3d6e7fc700 (LWP 17622)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 9 (Thread 0x7f3d6effd700 (LWP 17621)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 8 (Thread 0x7f3d6f7fe700 (LWP 17620)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 7 (Thread 0x7f3d6ffff700 (LWP 17619)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 6 (Thread 0x7f3d7cd73700 (LWP 17618)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 5 (Thread 0x7f3d7d574700 (LWP 17617)): #0 0x00007f3d85686e32 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0 #1 0x00007f3d859a0689 in () at /usr/lib/libdarktable.so #2 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #3 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 4 (Thread 0x7f3d7e039700 (LWP 17616)): #0 0x00007f3d8578e05f in poll () at /usr/lib/libc.so.6 #1 0x00007f3d85468168 in () at /usr/lib/libglib-2.0.so.0 #2 0x00007f3d85418c03 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0 #3 0x00007f3d848a01a8 in () at /usr/lib/libgio-2.0.so.0 #4 0x00007f3d85442511 in () at /usr/lib/libglib-2.0.so.0 #5 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #6 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 3 (Thread 0x7f3d7e83a700 (LWP 17615)): #0 0x00007f3d8579371d in syscall () at /usr/lib/libc.so.6 #1 0x00007f3d85462c9b in g_cond_wait_until () at /usr/lib/libglib-2.0.so.0 #2 0x00007f3d853ea803 in () at /usr/lib/libglib-2.0.so.0 #3 0x00007f3d853ea994 in g_async_queue_timeout_pop () at /usr/lib/libglib-2.0.so.0 #4 0x00007f3d85446caa in () at /usr/lib/libglib-2.0.so.0 #5 0x00007f3d85442511 in () at /usr/lib/libglib-2.0.so.0 #6 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #7 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 2 (Thread 0x7f3d7f03b700 (LWP 17614)): #0 0x00007f3d8578e05f in poll () at /usr/lib/libc.so.6 #1 0x00007f3d85468168 in () at /usr/lib/libglib-2.0.so.0 #2 0x00007f3d85419221 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0 #3 0x00007f3d85419272 in () at /usr/lib/libglib-2.0.so.0 #4 0x00007f3d85442511 in () at /usr/lib/libglib-2.0.so.0 #5 0x00007f3d85680422 in start_thread () at /usr/lib/libpthread.so.0 #6 0x00007f3d85798bf3 in clone () at /usr/lib/libc.so.6 Thread 1 (Thread 0x7f3d7f387140 (LWP 17613)): #0 0x00007f3d85765c3f in wait4 () at /usr/lib/libc.so.6 #1 0x00007f3d8598eb22 in () at /usr/lib/libdarktable.so #2 0x00007f3d856d53e0 in () at /usr/lib/libc.so.6 #3 0x00007f3d2ddaf217 in () at /usr/lib/libigc.so.1 #4 0x00007f3d2ddb0a2a in () at /usr/lib/libigc.so.1 #5 0x00007f3d2dd50c00 in () at /usr/lib/libigc.so.1 #6 0x00007f3d2dd50e5b in () at /usr/lib/libigc.so.1 #7 0x00007f3d2dc3bc10 in () at /usr/lib/libigc.so.1 #8 0x00007f3d2dcd13e8 in () at /usr/lib/libigc.so.1 #9 0x00007f3d2db60934 in () at /usr/lib/libigc.so.1 #10 0x00007f3d2dbb414f in () at /usr/lib/libigc.so.1 #11 0x00007f3d337005d8 in llvm::FPPassManager::runOnFunction(llvm::Function&) () at /usr/lib/libLLVM-10.so #12 0x00007f3d33701bdd in llvm::FPPassManager::runOnModule(llvm::Module&) () at /usr/lib/libLLVM-10.so #13 0x00007f3d33701f70 in llvm::legacy::PassManagerImpl::run(llvm::Module&) () at /usr/lib/libLLVM-10.so #14 0x00007f3d2d9fcdd4 in () at /usr/lib/libigc.so.1 #15 0x00007f3d2d9d6061 in () at /usr/lib/libigc.so.1 #16 0x00007f3d2d8bb994 in () at /usr/lib/libigc.so.1 #17 0x00007f3d2d96ebba in () at /usr/lib/libigc.so.1 #18 0x00007f3d7c2b32ea in () at /usr/lib/intel-opencl/libigdrcl.so #19 0x00007f3d7c0b6d50 in () at /usr/lib/intel-opencl/libigdrcl.so #20 0x00007f3d7c04ea02 in () at /usr/lib/intel-opencl/libigdrcl.so #21 0x00007f3d7d70310e in clBuildProgram () at /usr/lib/libOpenCL.so #22 0x00007f3d85973e48 in dt_opencl_build_program () at /usr/lib/libdarktable.so #23 0x00007f3d859752b3 in () at /usr/lib/libdarktable.so #24 0x00007f3d859790c0 in dt_opencl_init () at /usr/lib/libdarktable.so #25 0x00007f3d858f51ed in dt_init () at /usr/lib/libdarktable.so #26 0x0000560706344037 in () #27 0x00007f3d856c0002 in __libc_start_main () at /usr/lib/libc.so.6 #28 0x000056070634408e in () [Inferior 1 (process 17613) detached]