Rkward crash error

Application: RKWard (rkward.frontend), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f89dba81780 (LWP 2859))]

Thread 5 (Thread 0x7f89cc5cc700 (LWP 2864)):
#0  0x00007f89d58baf03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f89d1e93104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f89d1e939f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f89ccf2bc44 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f89d1eba3e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f89d8fa6d8c in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#6  0x00007f89d58c804d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#7  0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f89bacdc700 (LWP 2866)):
#0  0x00007f89d8faad9d in pthread_mutex_unlock () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f89d1e92094 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f89d1e92f9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f89d1e93639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f89d75da446 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007f89d75ae882 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007f89d75aeabc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#7  0x00007f89d74c5924 in QThread::exec() () from /usr/lib/libQtCore.so.4
#8  0x000000000050cdb0 in _start ()

Thread 3 (Thread 0x7f89b902a700 (LWP 2870)):
#0  0x00007f89d8fabbac in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f89d96802a2 in ?? () from /usr/lib/libQtScript.so.4
#2  0x00007f89d96802d9 in ?? () from /usr/lib/libQtScript.so.4
#3  0x00007f89d8fa6d8c in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f89d58c804d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f89c0fc0700 (LWP 3516)):
#0  0x00007f89d58baf03 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f89d1e93104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f89d1e93639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f89d75da446 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#4  0x00007f89d75ae882 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007f89d75aeabc in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007f89d74c5924 in QThread::exec() () from /usr/lib/libQtCore.so.4
#7  0x00007f89d7590c2f in ?? () from /usr/lib/libQtCore.so.4
#8  0x00007f89d74c8175 in ?? () from /usr/lib/libQtCore.so.4
#9  0x00007f89d8fa6d8c in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x00007f89d58c804d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f89dba81780 (LWP 2859)):
[KCrash Handler]
#6  0x00000000004ecdf1 in _start ()