Hello there!
I recently started using kdenlive for editing. A few days everything worked great, but now it crashes randomly on simple editing actions. I'll paste the crash dump below.

Code: Select all

*** Error in `kdenlive': double free or corruption (out): 0x00007fe5e4e052a0 ***
======= Backtrace: =========
/usr/lib/libc.so.6(+0x6f364)[0x7fe77271e364]
/usr/lib/libc.so.6(+0x74d96)[0x7fe772723d96]
/usr/lib/libc.so.6(+0x7557e)[0x7fe77272457e]
/usr/lib/libmlt.so.6(mlt_properties_close+0xa4)[0x7fe77917d124]
/usr/lib/libmlt.so.6(mlt_frame_close+0x5c)[0x7fe7791769dc]
/usr/lib/libmlt.so.6(mlt_consumer_purge+0xae)[0x7fe77918a79e]
kdenlive[0x7d8316]
kdenlive[0x545839]
kdenlive[0x586298]
/usr/lib/libQt5Widgets.so.5(_ZN12QUndoCommand4redoEv+0x2e)[0x7fe774c5073e]
/usr/lib/libQt5Widgets.so.5(_ZN10QUndoStack4pushEP12QUndoCommand+0x38)[0x7fe774c52298]
kdenlive[0x558f2e]
kdenlive[0x810006]
/usr/lib/libQt5Core.so.5(_ZN11QMetaObject8activateEP7QObjectiiPPv+0x690)[0x7fe773381870]
/usr/lib/libQt5Widgets.so.5(_ZN7QAction9triggeredEb+0x42)[0x7fe7748cb3d2]
/usr/lib/libQt5Widgets.so.5(_ZN7QAction8activateENS_11ActionEventE+0x110)[0x7fe7748cdef0]
/usr/lib/libQt5Widgets.so.5(_ZN7QAction5eventEP6QEvent+0xff)[0x7fe7748ce84f]
/usr/lib/libQt5Widgets.so.5(_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0x9c)[0x7fe7748d468c]
/usr/lib/libQt5Widgets.so.5(_ZN12QApplication6notifyEP7QObjectP6QEvent+0x256)[0x7fe7748d98f6]
/usr/lib/libQt5Core.so.5(_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent+0x108)[0x7fe773355518]
/usr/lib/libQt5Gui.so.5(_ZN12QShortcutMap13dispatchEventEP9QKeyEvent+0x106)[0x7fe7738ca826]
/usr/lib/libQt5Gui.so.5(_ZN12QShortcutMap11tryShortcutEP9QKeyEvent+0x59)[0x7fe7738ca8d9]
/usr/lib/libQt5Gui.so.5(_ZN22QWindowSystemInterface19handleShortcutEventEP7QWindowmi6QFlagsIN2Qt16KeyboardModifierEEjjjRK7QStringbt+0xb6)[0x7fe773883716]
/usr/lib/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate15processKeyEventEPN29QWindowSystemInterfacePrivate8KeyEventE+0x134)[0x7fe77389ba14]
/usr/lib/libQt5Gui.so.5(_ZN22QGuiApplicationPrivate24processWindowSystemEventEPN29QWindowSystemInterfacePrivate17WindowSystemEventE+0x115)[0x7fe7738a0b65]
/usr/lib/libQt5Gui.so.5(_ZN22QWindowSystemInterface22sendWindowSystemEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0xbb)[0x7fe77387dd6b]
/usr/lib/libQt5XcbQpa.so.5(+0x6cd10)[0x7fe766e83d10]
/usr/lib/libglib-2.0.so.0(g_main_context_dispatch+0x2a7)[0x7fe76eab4d87]
/usr/lib/libglib-2.0.so.0(+0x49fe0)[0x7fe76eab4fe0]
/usr/lib/libglib-2.0.so.0(g_main_context_iteration+0x2c)[0x7fe76eab508c]
/usr/lib/libQt5Core.so.5(_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x5f)[0x7fe7733aac8f]
/usr/lib/libQt5Core.so.5(_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0xfa)[0x7fe7733536fa]
/usr/lib/libQt5Core.so.5(_ZN16QCoreApplication4execEv+0x9c)[0x7fe77335bb7c]
kdenlive[0x47c5c2]
/usr/lib/libc.so.6(__libc_start_main+0xf0)[0x7fe7726cf710]
kdenlive(_start+0x29)[0x47cc29]
======= Memory map: ========
00400000-008f7000 r-xp 00000000 08:01 5257554                            /usr/bin/kdenlive
00af6000-00b0f000 r--p 004f6000 08:01 5257554                            /usr/bin/kdenlive
00b0f000-00b16000 rw-p 0050f000 08:01 5257554                            /usr/bin/kdenlive
01277000-17c7a000 rw-p 00000000 00:00 0                                  [heap]
408a0000-4093f000 rw-p 00000000 00:00 0
414a4000-414a6000 r-xs 00000000 00:22 32                                 /tmp/.glxudmUl (deleted)
417c5000-41903000 rw-p 00000000 00:00 0
41b73000-41c12000 rw-p 00000000 00:00 0
7fe53c000000-7fe53c633000 rw-p 00000000 00:00 0
7fe53c633000-7fe540000000 ---p 00000000 00:00 0
7fe540000000-7fe540603000 rw-p 00000000 00:00 0
7fe540603000-7fe544000000 ---p 00000000 00:00 0
7fe544000000-7fe54464d000 rw-p 00000000 00:00 0
7fe54464d000-7fe548000000 ---p 00000000 00:00 0
7fe548000000-7fe54864f000 rw-p 00000000 00:00 0
7fe54864f000-7fe54c000000 ---p 00000000 00:00 0
7fe54c000000-7fe54c5d1000 rw-p 00000000 00:00 0
7fe54c5d1000-7fe550000000 ---p 00000000 00:00 0
7fe550000000-7fe5505ce000 rw-p 00000000 00:00 0
7fe5505ce000-7fe554000000 ---p 00000000 00:00 0
7fe554000000-7fe5545cc000 rw-p 00000000 00:00 0
7fe5545cc000-7fe558000000 ---p 00000000 00:00 0
7fe558000000-7fe5585d0000 rw-p 00000000 00:00 0
7fe5585d0000-7fe55c000000 ---p 00000000 00:00 0
7fe55c000000-7fe55e579000 rw-p 00000000 00:00 0
7fe55e579000-7fe560000000 ---p 00000000 00:00 0
7fe564000000-7fe56463b000 rw-p 00000000 00:00 0
7fe56463b000-7fe568000000 ---p 00000000 00:00 0
7fe568000000-7fe568608000 rw-p 00000000 00:00 0
7fe568608000-7fe56c000000 ---p 00000000 00:00 0
7fe56c000000-7fe56c655000 rw-p 00000000 00:00 0
7fe56c655000-7fe570000000 ---p 00000000 00:00 0
7fe570000000-7fe570655000 rw-p 00000000 00:00 0
7fe570655000-7fe574000000 ---p 00000000 00:00 0
7fe574000000-7fe574655000 rw-p 00000000 00:00 0
7fe574655000-7fe578000000 ---p 00000000 00:00 0
7fe578000000-7fe578655000 rw-p 00000000 00:00 0
7fe578655000-7fe57c000000 ---p 00000000 00:00 0
7fe57c000000-7fe57c654000 rw-p 00000000 00:00 0
7fe57c654000-7fe580000000 ---p 00000000 00:00 0
7fe580000000-7fe580656000 rw-p 00000000 00:00 0
7fe580656000-7fe584000000 ---p 00000000 00:00 0
7fe584000000-7fe5849c4000 rw-p 00000000 00:00 0
7fe5849c4000-7fe588000000 ---p 00000000 00:00 0
7fe588000000-7fe5889cf000 rw-p 00000000 00:00 0
7fe5889cf000-7fe58c000000 ---p 00000000 00:00 0
7fe58c000000-7fe58d709000 rw-p 00000000 00:00 0
7fe58d709000-7fe590000000 ---p 00000000 00:00 0
7fe594000000-7fe596b45000 rw-p 00000000 00:00 0
7fe596b45000-7fe598000000 ---p 00000000 00:00 0
7fe59c000000-7fe59e737000 rw-p 00000000 00:00 0
7fe59e737000-7fe5a0000000 ---p 00000000 00:00 0
7fe5a0000000-7fe5a1b72000 rw-p 00000000 00:00 0
7fe5a1b72000-7fe5a4000000 ---p 00000000 00:00 0
7fe5a4000000-7fe5a4639000 rw-p 00000000 00:00 0
7fe5a4639000-7fe5a8000000 ---p 00000000 00:00 0
7fe5a8000000-7fe5a8602000 rw-p 00000000 00:00 0
7fe5a8602000-7fe5ac000000 ---p 00000000 00:00 0
7fe5ac000000-7fe5ac657000 rw-p 00000000 00:00 0
7fe5ac657000-7fe5b0000000 ---p 00000000 00:00 0
7fe5b0000000-7fe5b0651000 rw-p 00000000 00:00 0
7fe5b0651000-7fe5b4000000 ---p 00000000 00:00 0
7fe5b4000000-7fe5b4657000 rw-p 00000000 00:00 0
7fe5b4657000-7fe5b8000000 ---p 00000000 00:00 0
7fe5b8000000-7fe5b865b000 rw-p 00000000 00:00 0
7fe5b865b000-7fe5bc000000 ---p 00000000 00:00 0
7fe5bc000000-7fe5bc655000 rw-p 00000000 00:00 0
7fe5bc655000-7fe5c0000000 ---p 00000000 00:00 0
7fe5c0000000-7fe5c0651000 rw-p 00000000 00:00 0
7fe5c0651000-7fe5c4000000 ---p 00000000 00:00 0
7fe5c4000000-7fe5c6136000 rw-p 00000000 00:00 0
7fe5c6136000-7fe5c8000000 ---p 00000000 00:00 0
7fe5c8000000-7fe5c89cc000 rw-p 00000000 00:00 0
7fe5c89cc000-7fe5cc000000 ---p 00000000 00:00 0
7fe5cc000000-7fe5ce97b000 rw-p 00000000 00:00 0
7fe5ce97b000-7fe5d0000000 ---p 00000000 00:00 0
7fe5d4000000-7fe5d7e01000 rw-p 00000000 00:00 0
7fe5d7e01000-7fe5d8000000 ---p 00000000 00:00 0
7fe5dc000000-7fe5dfe15000 rw-p 00000000 00:00 0
7fe5dfe15000-7fe5e0000000 ---p 00000000 00:00 0
7fe5e0000000-7fe5e3e0e000 rw-p 00000000 00:00 0
7fe5e3e0e000-7fe5e4000000 ---p 00000000 00:00 0
7fe5e4000000-7fe5e7e0d000 rw-p 00000000 00:00 0
7fe5e7e0d000-7fe5e8000000 ---p 00000000 00:00 0
7fe5ec000000-7fe5efe13000 rw-p 00000000 00:00 0
7fe5efe13000-7fe5f0000000 ---p 00000000 00:00 0
7fe5f4000000-7fe5f7e19000 rw-p 00000000 00:00 0
7fe5f7e19000-7fe5f8000000 ---p 00000000 00:00 0
7fe5fb7ff000-7fe5fb800000 ---p 00000000 00:00 0
7fe5fb800000-7fe5fc000000 rw-p 00000000 00:00 0                          [stack:3088]
7fe5fc000000-7fe5ffc01000 rw-p 00000000 00:00 0
7fe5ffc01000-7fe600000000 ---p 00000000 00:00 0
7fe6007f9000-7fe6007fa000 ---p 00000000 00:00 0
7fe6007fa000-7fe600ffa000 rw-p 00000000 00:00 0                          [stack:3087]
7fe600ffa000-7fe600ffb000 ---p 00000000 00:00 0
7fe600ffb000-7fe6017fb000 rw-p 00000000 00:00 0                          [stack:3086]
7fe6017fb000-7fe6017fc000 ---p 00000000 00:00 0
7fe6017fc000-7fe601ffc000 rw-p 00000000 00:00 0                          [stack:3085]
7fe601ffc000-7fe601ffd000 ---p 00000000 00:00 0
7fe601ffd000-7fe6027fd000 rw-p 00000000 00:00 0                          [stack:3084]
7fe6027fd000-7fe6027fe000 ---p 00000000 00:00 0
7fe6027fe000-7fe602ffe000 rw-p 00000000 00:00 0                          [stack:3083]
7fe602ffe000-7fe602fff000 ---p 00000000 00:00 0
7fe602fff000-7fe6037ff000 rw-p 00000000 00:00 0                          [stack:3082]
7fe6037ff000-7fe603800000 ---p 00000000 00:00 0
7fe603800000-7fe604000000 rw-p 00000000 00:00 0                          [stack:3081]
7fe604000000-7fe607a12000 rw-p 00000000 00:00 0
7fe607a12000-7fe608000000 ---p 00000000 00:00 0
7fe6087f9000-7fe6087fa000 ---p 00000000 00:00 0
7fe6087fa000-7fe608ffa000 rw-p 00000000 00:00 0                          [stack:3019]
7fe608ffa000-7fe608ffb000 ---p 00000000 00:00 0
7fe608ffb000-7fe6097fb000 rw-p 00000000 00:00 0                          [stack:3018]
7fe6097fb000-7fe6097fc000 ---p 00000000 00:00 0
7fe6097fc000-7fe609ffc000 rw-p 00000000 00:00 0                          [stack:3017]
7fe609ffc000-7fe609ffd000 ---p 00000000 00:00 0
7fe609ffd000-7fe60a7fd000 rw-p 00000000 00:00 0                          [stack:3016]
7fe60a7fd000-7fe60a7fe000 ---p 00000000 00:00 0
7fe60a7fe000-7fe60affe000 rw-p 00000000 00:00 0                          [stack:3015]
7fe60affe000-7fe60afff000 ---p 00000000 00:00 0
7fe60afff000-7fe60b7ff000 rw-p 00000000 00:00 0                          [stack:3014]
7fe60b7ff000-7fe60b800000 ---p 00000000 00:00 0
7fe60b800000-7fe60c000000 rw-p 00000000 00:00 0                          [stack:3013]
7fe60c000000-7fe60ffdd000 rw-p 00000000 00:00 0
7fe60ffdd000-7fe610000000 ---p 00000000 00:00 0
7fe610000000-7fe613a19000 rw-p 00000000 00:00 0
7fe613a19000-7fe614000000 ---p 00000000 00:00 0
7fe614000000-7fe617a0c000 rw-p 00000000 00:00 0
7fe617a0c000-7fe618000000 ---p 00000000 00:00 0
7fe618000000-7fe61ba12000 rw-p 00000000 00:00 0
7fe61ba12000-7fe61c000000 ---p 00000000 00:00 0
7fe61c000000-7fe61fa0c000 rw-p 00000000 00:00 0
7fe61fa0c000-7fe620000000 ---p 00000000 00:00 0
7fe6207f7000-7fe6207f8000 ---p 00000000 00:00 0
7fe6207f8000-7fe620ff8000 rw-p 00000000 00:00 0                          [stack:3012]
7fe620ff8000-7fe620ff9000 ---p 00000000 00:00 0
7fe620ff9000-7fe6217f9000 rw-p 00000000 00:00 0                          [stack:3011]
7fe6217f9000-7fe6217fa000 ---p 00000000 00:00 0
7fe6217fa000-7fe621ffa000 rw-p 00000000 00:00 0                          [stack:3010]
7fe621ffa000-7fe621ffb000 ---p 00000000 00:00 0
7fe621ffb000-7fe6227fb000 rw-p 00000000 00:00 0                          [stack:3009]
7fe6227fb000-7fe6227fc000 ---p 00000000 00:00 0
7fe6227fc000-7fe622ffc000 rw-p 00000000 00:00 0                          [stack:3008]
7fe622ffc000-7fe622ffd000 ---p 00000000 00:00 0
7fe622ffd000-7fe6237fd000 rw-p 00000000 00:00 0                          [stack:3007]
7fe6237fd000-7fe6237fe000 ---p 00000000 00:00 0
7fe6237fe000-7fe623ffe000 rw-p 00000000 00:00 0                          [stack:3006]
7fe623ffe000-7fe627fff000 rw-s 00000000 00:13 6                          /dev/shm/pulse-shm-2406896618
7fe627fff000-7fe62c000000 rw-s 00000000 00:13 56                         /dev/shm/pulse-shm-2335620078
7fe62c000000-7fe62c601000 rw-p 00000000 00:00 0
7fe62c601000-7fe630000000 ---p 00000000 00:00 0
7fe630000000-7fe633c01000 rw-p 00000000 00:00 0
7fe633c01000-7fe634000000 ---p 00000000 00:00 0
7fe634000000-7fe6345d9000 rw-p 00000000 00:00 0
7fe6345d9000-7fe638000000 ---p 00000000 00:00 0
7fe638000000-7fe638629000 rw-p 00000000 00:00 0
7fe638629000-7fe63c000000 ---p 00000000 00:00 0
7fe63c000000-7fe63c5d3000 rw-p 00000000 00:00 0
7fe63c5d3000-7fe640000000 ---p 00000000 00:00 0
7fe640000000-7fe6405e5000 rw-p 00000000 00:00 0
7fe6405e5000-7fe644000000 ---p 00000000 00:00 0
7fe644000000-7fe647c14000 rw-p 00000000 00:00 0
7fe647c14000-7fe648000000 ---p 00000000 00:00 0
7fe648000000-7fe6485d1000 rw-p 00000000 00:00 0
7fe6485d1000-7fe64c000000 ---p 00000000 00:00 0
7fe64c000000-7fe64c5d1000 rw-p 00000000 00:00 0
7fe64c5d1000-7fe650000000 ---p 00000000 00:00 0
7fe650000000-7fe653fa7000 rw-p 00000000 00:00 0
7fe653fa7000-7fe654000000 ---p 00000000 00:00 0
7fe654000000-7fe657c14000 rw-p 00000000 00:00 0
7fe657c14000-7fe658000000 ---p 00000000 00:00 0
7fe658000000-7fe65bc14000 rw-p 00000000 00:00 0
7fe65bc14000-7fe65c000000 ---p 00000000 00:00 0
7fe65c000000-7fe65fc14000 rw-p 00000000 00:00 0
7fe65fc14000-7fe660000000 ---p 00000000 00:00 0
7fe660000000-7fe6605cf000 rw-p 00000000 00:00 0
7fe6605cf000-7fe664000000 ---p 00000000 00:00 0
7fe664000000-7fe667c14000 rw-p 00000000 00:00 0
7fe667c14000-7fe668000000 ---p 00000000 00:00 0
7fe668000000-7fe66bc14000 rw-p 00000000 00:00 0
7fe66bc14000-7fe66c000000 ---p 00000000 00:00 0
7fe66c000000-7fe66c9b2000 rw-p 00000000 00:00 0
7fe66c9b2000-7fe670000000 ---p 00000000 00:00 0
7fe6707f8000-7fe6707f9000 ---p 00000000 00:00 0
7fe6707f9000-7fe670ff9000 rw-p 00000000 00:00 0                          [stack:3005]
7fe670ff9000-7fe670ffa000 ---p 00000000 00:00 0
7fe670ffa000-7fe6717fa000 rw-p 00000000 00:00 0                          [stack:3004]
7fe6717fa000-7fe6717fb000 ---p 00000000 00:00 0
7fe6717fb000-7fe671ffb000 rw-p 00000000 00:00 0                          [stack:3003]
7fe671ffb000-7fe671ffc000 ---p 00000000 00:00 0
7fe671ffc000-7fe6727fc000 rw-p 00000000 00:00 0                          [stack:3002]
7fe6727fc000-7fe6727fd000 ---p 00000000 00:00 0
7fe6727fd000-7fe672ffd000 rw-p 00000000 00:00 0                          [stack:3080]
7fe672ffd000-7fe672ffe000 ---p 00000000 00:00 0
7fe672ffe000-7fe6737fe000 rw-p 00000000 00:00 0                          [stack:3079]
7fe6737fe000-7fe6737ff000 ---p 00000000 00:00 0
7fe6737ff000-7fe673fff000 rw-p 00000000 00:00 0                          [stack:2999]
7fe673fff000-7fe6f3fff000 rwxp 00000000 00:00 0
7fe6f3fff000-7fe6f8000000 rw-s 00000000 00:13 6                          /dev/shm/pulse-shm-2406896618
7fe6f8000000-7fe6fbd08000 rw-p 00000000 00:00 0
7fe6fbd08000-7fe6fc000000 ---p 00000000 00:00 0
7fe6fc7f9000-7fe6fc7fa000 ---p 00000000 00:00 0
7fe6fc7fa000-7fe6fcffa000 rw-p 00000000 00:00 0                          [stack:2998]
7fe6fcffa000-7fe6fcffb000 ---p 00000000 00:00 0
7fe6fcffb000-7fe6fd7fb000 rw-p 00000000 00:00 0                          [stack:2997]
7fe6fd7fb000-7fe6fd7fc000 ---p 00000000 00:00 0
7fe6fd7fc000-7fe6fdffc000 rw-p 00000000 00:00 0                          [stack:2996]
7fe6fdffc000-7fe6fdffd000 ---p 00000000 00:00 0
7fe6fdffd000-7fe6fe7fd000 rw-p 00000000 00:00 0                          [stack:2995]
7fe6fe7fd000-7fe6fe7fe000 ---p 00000000 00:00 0
7fe6fe7fe000-7fe6feffe000 rw-p 00000000 00:00 0                          [stack:2994]
7fe6feffe000-7fe6fefff000 ---p 00000000 00:00 0
7fe6fefff000-7fe6ff7ff000 rw-p 00000000 00:00 0                          [stack:2993]
7fe6ff7ff000-7fe6ff800000 ---p 00000000 00:00 0
7fe6ff800000-7fe700000000 rw-p 00000000 00:00 0                          [stack:2992]
7fe700000000-7fe70234f000 rw-p 00000000 00:00 0
7fe70234f000-7fe704000000 ---p 00000000 00:00 0
7fe704747000-7fe704748000 ---p 00000000 00:00 0
7fe704748000-7fe704f48000 rw-p 00000000 00:00 0                          [stack:2991]
7fe704f48000-7fe704f49000 ---p 00000000 00:00 0
7fe704f49000-7fe705749000 rw-p 00000000 00:00 0                          [stack:3078]
7fe705749000-7fe70574a000 ---p 00000000 00:00 0
7fe70574a000-7fe705f4a000 rw-p 00000000 00:00 0                          [stack:3077]
7fe705f4a000-7fe705f4c000 r-xp 00000000 08:01 6166073                    /usr/lib/vlc/plugins/audio_filter/libsamplerate_plugin.so
7fe705f4c000-7fe70614b000 ---p 00002000 08:01 6166073                    /usr/lib/vlc/plugins/audio_filter/libsamplerate_plugin.so
7fe70614b000-7fe70614c000 r--p 00001000 08:01 6166073                    /usr/lib/vlc/plugins/audio_filter/libsamplerate_plugin.so
7fe70614c000-7fe70614d000 rw-p 00002000 08:01 6166073                    /usr/lib/vlc/plugins/audio_filter/libsamplerate_plugin.so
7fe70614d000-7fe706151000 r-xp 00000000 08:01 6166043                    /usr/lib/vlc/plugins/audio_filter/libscaletempo_plugin.so
7fe706151000-7fe706350000 ---p 00004000 08:01 6166043                    /usr/lib/vlc/plugins/audio_filter/libscaletempo_plugin.so
7fe706350000-7fe706351000 r--p 00003000 08:01 6166043                    /usr/lib/vlc/plugins/audio_filter/libscaletempo_plugin.so
7fe706351000-7fe706352000 rw-p 00004000 08:01 6166043                    /usr/lib/vlc/plugins/audio_filter/libscaletempo_plugin.so
7fe706352000-7fe706354000 r-xp 00000000 08:01 6166281                    /usr/lib/vlc/plugins/audio_mixer/libfloat_mixer_plugin.so
7fe706354000-7fe706553000 ---p 00002000 08:01 6166281                    /usr/lib/vlc/plugins/audio_mixer/libfloat_mixer_plugin.so
7fe706553000-7fe706554000 r--p 00001000 08:01 6166281                    /usr/lib/vlc/plugins/audio_mixer/libfloat_mixer_plugin.so
7fe706554000-7fe706555000 rw-p 00002000 08:01 6166281                    /usr/lib/vlc/plugins/audio_mixer/libfloat_mixer_plugin.so
7fe706555000-7fe70655b000 r-xp 00000000 08:01 6166248                    /usr/lib/vlc/plugins/codec/libvorbis_plugin.so
7fe70655b000-7fe70675a000 ---p 00006000 08:01 6166248                    /usr/lib/vlc/plugins/codec/libvorbis_plugin.so
7fe70675a000-7fe70675b000 r--p 00005000 08:01 6166248                    /usr/lib/vlc/plugins/codec/libvorbis_plugin.so
7fe70675b000-7fe70675c000 rw-p 00006000 08:01 6166248                    /usr/lib/vlc/plugins/codec/libvorbis_plugin.so
7fe70675c000-7fe70675e000 r-xp 00000000 08:01 6166175                    /usr/lib/vlc/plugins/codec/libaes3_plugin.so
7fe70675e000-7fe70695d000 ---p 00002000 08:01 6166175                    /usr/lib/vlc/plugins/codec/libaes3_plugin.so
7fe70695d000-7fe70695e000 r--p 00001000 08:01 6166175                    /usr/lib/vlc/plugins/codec/libaes3_plugin.so
7fe70695e000-7fe70695f000 rw-p 00002000 08:01 6166175                    /usr/lib/vlc/plugins/codec/libaes3_plugin.so
7fe70695f000-7fe706963000 r-xp 00000000 08:01 6166238                    /usr/lib/vlc/plugins/codec/libsubstx3g_plugin.so
7fe706963000-7fe706b62000 ---p 00004000 08:01 6166238                    /usr/lib/vlc/plugins/codec/libsubstx3g_plugin.so
7fe706b62000-7fe706b63000 r--p 00003000 08:01 6166238                    /usr/lib/vlc/plugins/codec/libsubstx3g_plugin.so
7fe706b63000-7fe706b64000 rw-p 00004000 08:01 6166238                    /usr/lib/vlc/plugins/codec/libsubstx3g_plugin.so
7fe706b64000-7fe706b69000 r-xp 00000000 08:01 6166246                    /usr/lib/vlc/plugins/codec/libtheora_plugin.so
7fe706b69000-7fe706d68000 ---p 00005000 08:01 6166246                    /usr/lib/vlc/plugins/codec/libtheora_plugin.so
7fe706d68000-7fe706d69000 r--p 00004000 08:01 6166246                    /usr/lib/vlc/plugins/codec/libtheora_plugin.so
7fe706d69000-7fe706d6a000 rw-p 00005000 08:01 6166246                    /usr/lib/vlc/plugins/codec/libtheora_plugin.so
7fe706d6a000-7fe706d6f000 r-xp 00000000 08:01 6166245                    /usr/lib/vlc/plugins/codec/libspeex_plugin.so
7fe706d6f000-7fe706f6e000 ---p 00005000 08:01 6166245                    /usr/lib/vlc/plugins/codec/libspeex_plugin.so
7fe706f6e000-7fe706f6f000 r--p 00004000 08:01 6166245                    /usr/lib/vlc/plugins/codec/libspeex_plugin.so
7fe706f6f000-7fe706f70000 rw-p 00005000 08:01 6166245                    /usr/lib/vlc/plugins/codec/libspeex_plugin.so
7fe706f70000-7fe706f74000 r-xp 00000000 08:01 6166213                    /usr/lib/vlc/plugins/codec/liblibass_plugin.so
7fe706f74000-7fe707173000 ---p 00004000 08:01 6166213                    /usr/lib/vlc/plugins/codec/liblibass_plugin.so
7fe707173000-7fe707174000 r--p 00003000 08:01 6166213                    /usr/lib/vlc/plugins/codec/liblibass_plugin.so
7fe707174000-7fe707175000 rw-p 00004000 08:01 6166213                    /usr/lib/vlc/plugins/codec/liblibass_plugin.so
7fe707175000-7fe707179000 r-xp 00000000 08:01 6166187                    /usr/lib/vlc/plugins/codec/liblpcm_plugin.so
7fe707179000-7fe707378000 ---p 00004000 08:01 6166187                    /usr/lib/vlc/plugins/codec/liblpcm_plugin.so
7fe707378000-7fe707379000 r--p 00003000 08:01 6166187                    /usr/lib/vlc/plugins/codec/liblpcm_plugin.so
7fe707379000-7fe70737a000 rw-p 00004000 08:01 6166187                    /usr/lib/vlc/plugins/codec/liblpcm_plugin.so
7fe70737a000-7fe70737f000 r-xp 00000000 08:01 6166243                    /usr/lib/vlc/plugins/codec/libopus_plugin.so
7fe70737f000-7fe70757e000 ---p 00005000 08:01 6166243                    /usr/lib/vlc/plugins/codec/libopus_plugin.so
7fe70757e000-7fe70757f000 r--p 00004000 08:01 6166243                    /usr/lib/vlc/plugins/codec/libopus_plugin.so
7fe70757f000-7fe707580000 rw-p 00005000 08:01 6166243                    /usr/lib/vlc/plugins/codec/libopus_plugin.so
7fe707580000-7fe707583000 r-xp 00000000 08:01 6166241                    /usr/lib/vlc/plugins/codec/libflac_plugin.so
7fe707583000-7fe707782000 ---p 00003000 08:01 6166241                    /usr/lib/vlc/plugins/codec/libflac_plugin.so
7fe707782000-7fe707783000 r--p 00002000 08:01 6166241                    /usr/lib/vlc/plugins/codec/libflac_plugin.so
7fe707783000-7fe707784000 rw-p 00003000 08:01 6166241                    /usr/lib/vlc/plugins/codec/libflac_plugin.so
7fe707784000-7fe707789000 r-xp 00000000 08:01 6166185                    /usr/lib/vlc/plugins/codec/libg711_plugin.so
7fe707789000-7fe707988000 ---p 00005000 08:01 6166185                    /usr/lib/vlc/plugins/codec/libg711_plugin.so
7fe707988000-7fe707989000 r--p 00004000 08:01 6166185                    /usr/lib/vlc/plugins/codec/libg711_plugin.so
7fe707989000-7fe70798a000 rw-p 00005000 08:01 6166185                    /usr/lib/vlc/plugins/codec/libg711_plugin.so
7fe70798a000-7fe70798d000 r-xp 00000000 08:01 6166165                    /usr/lib/vlc/plugins/codec/liba52_plugin.so
7fe70798d000-7fe707b8c000 ---p 00003000 08:01 6166165                    /usr/lib/vlc/plugins/codec/liba52_plugin.so
7fe707b8c000-7fe707b8d000 r--p 00002000 08:01 6166165                    /usr/lib/vlc/plugins/codec/liba52_plugin.so
7fe707b8d000-7fe707b8e000 rw-p 00003000 08:01 6166165                    /usr/lib/vlc/plugins/codec/liba52_plugin.so
7fe707b8e000-7fe707bc6000 r-xp 00000000 08:01 5260387                    /usr/lib/libcroco-0.6.so.3.0.1
7fe707bc6000-7fe707dc5000 ---p 00038000 08:01 5260387                    /usr/lib/libcroco-0.6.so.3.0.1
7fe707dc5000-7fe707dc8000 r--p 00037000 08:01 5260387                    /usr/lib/libcroco-0.6.so.3.0.1
7fe707dc8000-7fe707dc9000 rw-p 0003a000 08:01 5260387                    /usr/lib/libcroco-0.6.so.3.0.1
7fe707dc9000-7fe707dfe000 r-xp 00000000 08:01 5272824                    /usr/lib/librsvg-2.so.2.40.15
7fe707dfe000-7fe707ffd000 ---p 00035000 08:01 5272824                    /usr/lib/librsvg-2.so.2.40.15
7fe707ffd000-7fe707ffe000 r--p 00034000 08:01 5272824                    /usr/lib/librsvg-2.so.2.40.15
7fe707ffe000-7fe707fff000 rw-p 00035000 08:01 5272824                    /usr/lib/librsvg-2.so.2.40.15
7fe70818f000-7fe708190000 ---p 00000000 00:00 0
7fe708190000-7fe708990000 rw-p 00000000 00:00 0                          [stack:3076]
7fe708990000-7fe708991000 ---p 00000000 00:00 0
7fe708991000-7fe709191000 rw-p 00000000 00:00 0                          [stack:3075]
7fe709191000-7fe709192000 ---p 00000000 00:00 0
7fe709192000-7fe709992000 rw-p 00000000 00:00 0                          [stack:3074]
7fe709992000-7fe709993000 ---p 00000000 00:00 0
7fe709993000-7fe70a193000 rw-p 00000000 00:00 0                          [stack:3073]
7fe70a193000-7fe70a194000 ---p 00000000 00:00 0
7fe70a194000-7fe70a994000 rw-p 00000000 00:00 0                          [stack:3072]
7fe70a994000-7fe70a995000 ---p 00000000 00:00 0
7fe70a995000-7fe70c000000 rw-p 00000000 00:00 0                          [stack:3071]
7fe70c000000-7fe70ed61000 rw-p 00000000 00:00 0
7fe70ed61000-7fe710000000 ---p 00000000 00:00 0
7fe71016b000-7fe71016d000 r-xp 00000000 08:01 6166200                    /usr/lib/vlc/plugins/codec/libsvgdec_plugin.so
7fe71016d000-7fe71036c000 ---p 00002000 08:01 6166200                    /usr/lib/vlc/plugins/codec/libsvgdec_plugin.so
7fe71036c000-7fe71036d000 r--p 00001000 08:01 6166200                    /usr/lib/vlc/plugins/codec/libsvgdec_plugin.so
7fe71036d000-7fe71036e000 rw-p 00002000 08:01 6166200                    /usr/lib/vlc/plugins/codec/libsvgdec_plugin.so
7fe71036e000-7fe710376000 r-xp 00000000 08:01 6166196                    /usr/lib/vlc/plugins/codec/libschroedinger_plugin.so
7fe710376000-7fe710576000 ---p 00008000 08:01 6166196                    /usr/lib/vlc/plugins/codec/libschroedinger_plugin.so
7fe710576000-7fe710577000 r--p 00008000 08:01 6166196                    /usr/lib/vlc/plugins/codec/libschroedinger_plugin.so
7fe710577000-7fe710578000 rw-p 00009000 08:01 6166196                    /usr/lib/vlc/plugins/codec/libschroedinger_plugin.so
7fe710578000-7fe71057b000 r-xp 00000000 08:01 6166192                    /usr/lib/vlc/plugins/codec/libcdg_plugin.so
7fe71057b000-7fe71077a000 ---p 00003000 08:01 6166192                    /usr/lib/vlc/plugins/codec/libcdg_plugin.so
7fe71077a000-7fe71077b000 r--p 00002000 08:01 6166192                    /usr/lib/vlc/plugins/codec/libcdg_plugin.so
7fe71077b000-7fe71077c000 rw-p 00003000 08:01 6166192                    /usr/lib/vlc/plugins/codec/libcdg_plugin.so
7fe71077c000-7fe71077f000 r-xp 00000000 08:01 6166197                    /usr/lib/vlc/plugins/codec/libpng_plugin.so
7fe71077f000-7fe71097e000 ---p 00003000 08:01 6166197                    /usr/lib/vlc/plugins/codec/libpng_plugin.so
7fe71097e000-7fe71097f000 r--p 00002000 08:01 6166197                    /usr/lib/vlc/plugins/codec/libpng_plugin.so
7fe71097f000-7fe710980000 rw-p 00003000 08:01 6166197                    /usr/lib/vlc/plugins/codec/libpng_plugin.so
7fe710980000-7fe710983000 r-xp 00000000 08:01 6166198                    /usr/lib/vlc/plugins/codec/libjpeg_plugin.so
7fe710983000-7fe710b82000 ---p 00003000 08:01 6166198                    /usr/lib/vlc/plugins/codec/libjpeg_plugin.so
7fe710b82000-7fe710b83000 r--p 00002000 08:01 6166198                    /usr/lib/vlc/plugins/codec/libjpeg_plugin.so
7fe710b83000-7fe710b84000 rw-p 00003000 08:01 6166198                    /usr/lib/vlc/plugins/codec/libjpeg_plugin.so
7fe710b84000-7fe710bbc000 r-xp 00000000 08:01 5255031                    /usr/lib/liblua.so.5.3.2
7fe710bbc000-7fe710dbb000 ---p 00038000 08:01 5255031                    /usr/lib/liblua.so.5.3.2
7fe710dbb000-7fe710dbd000 r--p 00037000 08:01 5255031                    /usr/lib/liblua.so.5.3.2
7fe710dbd000-7fe710dbe000 rw-p 00039000 08:01 5255031                    /usr/lib/liblua.so.5.3.2
7fe710dbe000-7fe710de7000 r-xp 00000000 08:01 6166098                    /usr/lib/vlc/plugins/lua/liblua_plugin.so
7fe710de7000-7fe710fe7000 ---p 00029000 08:01 6166098                    /usr/lib/vlc/plugins/lua/liblua_plugin.so
7fe710fe7000-7fe710fe9000 r--p 00029000 08:01 6166098                    /usr/lib/vlc/plugins/lua/liblua_plugin.so
7fe710fe9000-7fe710fea000 rw-p 0002b000 08:01 6166098                    /usr/lib/vlc/plugins/lua/liblua_plugin.so
7fe710fea000-7fe7110ef000 r-xp 00000000 08:01 5256678                    /usr/lib/libtag.so.1.15.1
7fe7110ef000-7fe7112ee000 ---p 00105000 08:01 5256678                    /usr/lib/libtag.so.1.15.1
7fe7112ee000-7fe7112f3000 r--p 00104000 08:01 5256678                    /usr/lib/libtag.so.1.15.1
7fe7112f3000-7fe7112f6000 rw-p 00109000 08:01 5256678                    /usr/lib/libtag.so.1.15.1Aborted (core dumped)


It seems to be more prone to this in "larger" projects with a dozen or more clips, but it also happened in a small one with only two clips.

Oh yeah, I'm using a fully updated Manjaro, with the i3 window manager and the kdenlive version is the current 15.12.3.

My tip would be to upgrade to 16.03.X as described in the bug report found here: viewtopic.php?f=265&t=132228

thanks! That worked for the random crashes!

Unfortunately I still get crashes whenever I move the clip under the current playback position away, so that under the current position there is nothing to show and then do anything else.

Please file a bug report with a stack trace when you're moving the clip. Please attach a minimal project that triggers the fault. And please file the MLT version you're using. Thank you!