"glib detected" double free or corrupt when addding extra tracks then deleting it

[Dv8tion]

*** glibc detected *** /usr/bin/python: double free or corruption (!prev): 0x000000000593ea60 ***
Ubuntu 12.04.1 64bit
Athlon X3 460
12GB(512MB)
OpenShot 1.4.3-alpha1 (only version that plays nice - with kdenlive]

libmlt - 0.8.0
melt --version
melt 0.8.0
Copyright (C) 2002-2012 Ushodaya Enterprises Limited
<http://www.mltframework.org/>

python --version
Python 2.7.3

As both kdenlive and Openshot in their own special way had been a bit flaky I 'd been starting them via command line.
With a few clips already open I was attempting to add tracks using the + button from the GUI
No error message.
I don't know if it matters, but System had been rebooted only about 10 minutes or so prior.

I'm confused. From the debug output It looks like the default 2.7 should work, but 2.6 is desired?

======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x7e626)[0x7f1e04d35626]
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0(gdk_region_union+0x97)[0x7f1e02290c47]
/usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0(+0x3d797)[0x7f1e0229a797]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x251960)[0x7f1e02760960]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x256e56)[0x7f1e02765e56]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(gtk_widget_queue_resize+0x5c)[0x7f1e02765ecc]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x203869)[0x7f1e02712869]
/usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0(+0x203ee8)[0x7f1e02712ee8]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x132)[0x7f1e03205ca2]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x21179)[0x7f1e03217179]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0xd79)[0x7f1e0321f099]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x82)[0x7f1e0321f242]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x14957)[0x7f1e0320a957]
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_object_notify+0x183)[0x7f1e0320c233]
/usr/lib/python2.7/dist-packages/gtk-2.0/gtk/_gtk.so(+0x14c850)[0x7f1e02c95850]
/usr/bin/python(PyEval_EvalFrameEx+0x2a4)[0x497ea4]
/usr/bin/python(PyEval_EvalFrameEx+0xa02)[0x498602]
/usr/bin/python(PyEval_EvalFrameEx+0xa02)[0x498602]
/usr/bin/python(PyEval_EvalFrameEx+0xa02)[0x498602]
/usr/bin/python(PyEval_EvalCodeEx+0x1a0)[0x49f1c0]
/usr/bin/python[0x4a8960]
/usr/bin/python(PyObject_Call+0x36)[0x4e9f36]
/usr/bin/python[0x4ec11a]
/usr/bin/python(PyObject_Call+0x36)[0x4e9f36]
/usr/bin/python(PyEval_CallObjectWithKeywords+0x36)[0x4ea396]
/usr/bin/python[0x4b0bc8]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x7e9a)[0x7f1e05fb7e9a]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)[0x7f1e04da94bd]
======= Memory map: ========
00400000-00671000 r-xp 00000000 08:02 6261 /usr/bin/python2.7
00870000-00871000 r--p 00270000 08:02 6261 /usr/bin/python2.7
00871000-008da000 rw-p 00271000 08:02 6261 /usr/bin/python2.7
008da000-008ec000 rw-p 00000000 00:00 0
00ddb000-1f46b000 rw-p 00000000 00:00 0 [heap]
7f1d0c000000-7f1d0c7d9000 rw-p 00000000 00:00 0
7f1d0c7d9000-7f1d10000000 ---p 00000000 00:00 0
7f1d14000000-7f1d17ef5000 rw-p 00000000 00:00 0
7f1d17ef5000-7f1d18000000 ---p 00000000 00:00 0
7f1d18000000-7f1d1bfe7000 rw-p 00000000 00:00 0
7f1d1bfe7000-7f1d1c000000 ---p 00000000 00:00 0
7f1d1c000000-7f1d1ffc6000 rw-p 00000000 00:00 0
7f1d1ffc6000-7f1d20000000 ---p 00000000 00:00 0
7f1d20000000-7f1d23e08000 rw-p 00000000 00:00 0
7f1d23e08000-7f1d24000000 ---p 00000000 00:00 0
7f1d24000000-7f1d27ec4000 rw-p 00000000 00:00 0
7f1d27ec4000-7f1d28000000 ---p 00000000 00:00 0
7f1d28000000-7f1d2bf42000 rw-p 00000000 00:00 0
7f1d2bf42000-7f1d2c000000 ---p 00000000 00:00 0
7f1d2c000000-7f1d2fe7d000 rw-p 00000000 00:00 0
7f1d2fe7d000-7f1d30000000 ---p 00000000 00:00 0
7f1d30000000-7f1d33f19000 rw-p 00000000 00:00 0
7f1d33f19000-7f1d34000000 ---p 00000000 00:00 0
7f1d34000000-7f1d37eec000 rw-p 00000000 00:00 0
7f1d37eec000-7f1d38000000 ---p 00000000 00:00 0
7f1d38000000-7f1d3be8c000 rw-p 00000000 00:00 0
7f1d3be8c000-7f1d3c000000 ---p 00000000 00:00 0
7f1d3c000000-7f1d3ff73000 rw-p 00000000 00:00 0
7f1d3ff73000-7f1d40000000 ---p 00000000 00:00 0
7f1d40000000-7f1d43e67000 rw-p 00000000 00:00 0
7f1d43e67000-7f1d44000000 ---p 00000000 00:00 0
7f1d44000000-7f1d47e01000 rw-p 00000000 00:00 0
7f1d47e01000-7f1d48000000 ---p 00000000 00:00 0
7f1d48000000-7f1d4bf85000 rw-p 00000000 00:00 0
7f1d4bf85000-7f1d4c000000 ---p 00000000 00:00 0
7f1d4c000000-7f1d4ffc9000 rw-p 00000000 00:00 0
7f1d4ffc9000-7f1d50000000 ---p 00000000 00:00 0
7f1d50000000-7f1d53f61000 rw-p 00000000 00:00 0
7f1d53f61000-7f1d54000000 ---p 00000000 00:00 0
7f1d54000000-7f1d57e0e000 rw-p 00000000 00:00 0
7f1d57e0e000-7f1d58000000 ---p 00000000 00:00 0
7f1d58000000-7f1d5bf92000 rw-p 00000000 00:00 0
7f1d5bf92000-7f1d5c000000 ---p 00000000 00:00 0
7f1d5c000000-7f1d5ffd5000 rw-p 00000000 00:00 0
7f1d5ffd5000-7f1d60000000 ---p 00000000 00:00 0
7f1d60000000-7f1d63e3f000 rw-p 00000000 00:00 0
7f1d63e3f000-7f1d64000000 ---p 00000000 00:00 0
7f1d64000000-7f1d66e33000 rw-p 00000000 00:00 0
7f1d66e33000-7f1d68000000 ---p 00000000 00:00 0
7f1d68000000-7f1d689fc000 rw-p 00000000 00:00 0
7f1d689fc000-7f1d6c000000 ---p 00000000 00:00 0
7f1d6c000000-7f1d6c47f000 rw-p 00000000 00:00 0
7f1d6c47f000-7f1d70000000 ---p 00000000 00:00 0
7f1d74000000-7f1d76be8000 rw-p 00000000 00:00 0
7f1d76be8000-7f1d78000000 ---p 00000000 00:00 0
7f1d78000000-7f1d79d12000 rw-p 00000000 00:00 0
7f1d79d12000-7f1d7c000000 ---p 00000000 00:00 0
7f1d7c000000-7f1d7cb9f000 rw-p 00000000 00:00 0
7f1d7cb9f000-7f1d80000000 ---p 00000000 00:00 0
7f1d80000000-7f1d80a7e000 rw-p 00000000 00:00 0
7f1d80a7e000-7f1d84000000 ---p 00000000 00:00 0
7f1d84000000-7f1d843c5000 rw-p 00000000 00:00 0
7f1d843c5000-7f1d88000000 ---p 00000000 00:00 0
7f1d88000000-7f1d884d9000 rw-p 00000000 00:00 0
7f1d884d9000-7f1d8c000000 ---p 00000000 00:00 0
7f1d8c000000-7f1d8c4e2000 rw-p 00000000 00:00 0
7f1d8c4e2000-7f1d90000000 ---p 00000000 00:00 0
7f1d90ff9000-7f1d90ffa000 ---p 00000000 00:00 0
7f1d90ffa000-7f1d917fa000 rw-p 00000000 00:00 0
7f1d917fa000-7f1d917fb000 ---p 00000000 00:00 0
7f1d917fb000-7f1d91ffb000 rw-p 00000000 00:00 0
7f1d91ffb000-7f1d91ffc000 ---p 00000000 00:00 0
7f1d91ffc000-7f1d927fc000 rw-p 00000000 00:00 0
7f1d927fc000-7f1d927fd000 ---p 00000000 00:00 0
7f1d927fd000-7f1d92ffd000 rw-p 00000000 00:00 0
7f1d937fe000-7f1d937ff000 ---p 00000000 00:00 0
7f1d937ff000-7f1d93fff000 rw-p 00000000 00:00 0
7f1d93fff000-7f1d98000000 rw-s 00000000 00:12 18960 /run/shm/pulse-shm-2714964648
7f1d98000000-7f1d99c81000 rw-p 00000000 00:00 0
7f1d99c81000-7f1d9c000000 ---p 00000000 00:00 0
7f1d9c000000-7f1d9c3ee000 rw-p 00000000 00:00 0
7f1d9c3ee000-7f1da0000000 ---p 00000000 00:00 0
7f1da0000000-7f1da0448000 rw-p 00000000 00:00 0
7f1da0448000-7f1da4000000 ---p 00000000 00:00 0
7f1da4000000-7f1da4444000 rw-p 00000000 00:00 0
7f1da4444000-7f1da8000000 ---p 00000000 00:00 0
7f1da8000000-7f1da9168000 rw-p 00000000 00:00 0
7f1da9168000-7f1dac000000 ---p 00000000 00:00 0
7f1dac000000-7f1dad98b000 rw-p 00000000 00:00 0
7f1dad98b000-7f1db0000000 ---p 00000000 00:00 0
7f1db0000000-7f1db3ffb000 rw-p 00000000 00:00 0
7f1db3ffb000-7f1db4000000 ---p 00000000 00:00 0
7f1db4000000-7f1db43c4000 rw-p 00000000 00:00 0
7f1db43c4000-7f1db8000000 ---p 00000000 00:00 0
7f1db800e000-7f1db8060000 r--p 00000000 08:02 399454 /usr/share/fonts/truetype/ubuntu-font-family/Ubuntu-B.ttf
7f1db99f8000-7f1db99f9000 ---p 00000000 00:00 0
7f1db99f9000-7f1dba1f9000 rw-p 00000000 00:00 0
7f1dbb9fc000-7f1dbc000000 rw-p 00000000 00:00 0
7f1dbc000000-7f1dbff6e000 rw-p 00000000 00:00 0
7f1dbff6e000-7f1dc0000000 ---p 00000000 00:00 0
7f1dc0000000-7f1dc0021000 rw-p 00000000 00:00 0
7f1dc0021000-7f1dc4000000 ---p 00000000 00:00 0
7f1dc4000000-7f1dc7fdb000 rw-p 00000000 00:00 0
7f1dc7fdb000-7f1dc8000000 ---p 00000000 00:00 0
7f1dc8005000-7f1dc8609000 rw-p 00000000 00:00 0
7f1dc8e0a000-7f1dc9710000 rw-p 00000000 00:00 0
7f1dc9f11000-7f1dc9f71000 rw-s 00000000 00:04 1146888 /SYSV00000000 (deleted)Aborted (core dumped)

[Andy Finch (fincha)]

No idea what causes this, as I can't reproduce it.

[Dv8tion (dv8tion)]

I assume you tried it on a VM?
 I'm too busy with this project, for which which I think 1.43a just corrupted the file for me and 1.42 says "clip instance has no attribute 'audio_fade_amount" which is odd as I know fade has exists for ages", but ah well.
I think I might just reinstall (4th time this week) and make sure everything is OK. Can't be too sure any more.
 Does Openshot play nice on Gentoo based systems?

I wonder thought, if there are just too many versions of various files running around these days. Just in Python, Blender installed 3.2, the default remains at 2.73 and there's warnings about not finding 2.6.