Comment 9 for bug 494472

I don't have the clipboard-monitoring application described as in but #418242, but it does happen when I have netbeans running, mostly when I switch applications after a while (a minute or two). Netbeans is java based, so, there is a similarity. Perhaps Netbeans has a similar clipboard monitoring code, that triggers the error.
Having reproduced the error, after starting inkscape from the terminal, this shows up, I hope it helps in tracing the problem :

** (inkscape:9765): CRITICAL **: void sp_ctrlpoint_set_color(SPCtrlPoint*, guint32): assertion `SP_IS_CTRLPOINT (cp)' failed
*** glibc detected *** inkscape: double free or corruption (!prev): 0x00000000083c9e30 ***
======= Backtrace: =========
/lib/libc.so.6(+0x775b6)[0x7fa682f675b6]
/lib/libc.so.6(cfree+0x73)[0x7fa682f6de53]
/usr/lib/libxml2.so.2(xmlFreeNodeList+0x108)[0x7fa6897775b8]
/usr/lib/libxml2.so.2(xmlFreeDoc+0xb8)[0x7fa689777368]
inkscape[0x5b737d]
inkscape[0x5c6f5d]
/usr/lib/libglibmm-2.4.so.1(+0x39e02)[0x7fa689f04e02]
/lib/libglib-2.0.so.0(g_main_context_dispatch+0x1f2)[0x7fa686a9d8c2]
/lib/libglib-2.0.so.0(+0x42748)[0x7fa686aa1748]
/lib/libglib-2.0.so.0(g_main_loop_run+0x195)[0x7fa686aa1c55]
/usr/lib/libgtk-x11-2.0.so.0(gtk_main+0xa7)[0x7fa688e2caf7]
inkscape[0x45392b]
inkscape[0x452db9]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7fa682f0ec4d]
inkscape[0x451fb9]
======= Memory map: ========
00400000-00dab000 r-xp 00000000 08:01 15767539 /usr/bin/inkscape
00fab000-00fad000 r--p 009ab000 08:01 15767539 /usr/bin/inkscape
00fad000-00fc1000 rw-p 009ad000 08:01 15767539 /usr/bin/inkscape
00fc1000-00fcc000 rw-p 00000000 00:00 0
01e74000-09c59000 rw-p 00000000 00:00 0 [heap]
7fa670000000-7fa670021000 rw-p 00000000 00:00 0
7fa670021000-7fa674000000 ---p 00000000 00:00 0
7fa675af2000-7fa675af4000 r-xp 00000000 08:01 15731492 /usr/lib/gconv/ISO8859-1.so
7fa675af4000-7fa675cf3000 ---p 00002000 08:01 15731492 /usr/lib/gconv/ISO8859-1.so
7fa675cf3000-7fa675cf4000 r--p 00001000 08:01 15731492 /usr/lib/gconv/ISO8859-1.so
7fa675cf4000-7fa675cf5000 rw-p 00002000 08:01 15731492 /usr/lib/gconv/ISO8859-1.so
7fa67645e000-7fa67671f000 rw-p 00000000 00:00 0
7fa67677e000-7fa67681f000 rw-p 00000000 00:00 0
7fa6768b4000-7fa6768d1000 r--p 00000000 08:01 16142925 /usr/share/fonts/truetype/thai/Norasi-BoldOblique.ttf
7fa6768d1000-7fa6768ee000 r--p 00000000 08:01 16142924 /usr/share/fonts/truetype/thai/Norasi-BoldItalic.ttf
7fa6768ee000-7fa676908000 r--p 00000000 08:01 16142923 /usr/share/fonts/truetype/thai/Norasi-Bold.ttf
7fa676908000-7fa676925000 r--p 00000000 08:01 16142927 /usr/share/fonts/truetype/thai/Norasi-Oblique.ttf
7fa676b6c000-7fa676b89000 r--p 00000000 08:01 16142926 /usr/share/fonts/truetype/thai/Norasi-Italic.ttf
7fa676cd7000-7fa676d57000 r--p 00000000 08:01 15764754 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-BoldOblique.ttf
7fa676d57000-7fa676d8f000 r--p 00000000 08:01 15764757 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono-Oblique.ttf
7fa676d8f000-7fa676da9000 r--p 00000000 08:01 16142928 /usr/share/fonts/truetype/thai/Norasi.ttf
7fa676daa000-7fa676dab000 ---p 00000000 00:00 0
7fa676dab000-7fa6775ab000 rw-p 00000000 00:00 0
7fa6775ab000-7fa6775af000 r-xp 00000000 08:01 21495810 /lib/libattr.so.1.1.0
7fa6775af000-7fa6777ae000 ---p 00004000 08:01 21495810 /lib/libattr.so.1.1.0
7fa6777ae000-7fa6777af000 r--p 00003000 08:01 21495810 /lib/libattr.so.1.1.0
7fa6777af000-7fa6777b0000 rw-p 00004000 08:01 21495810 /lib/libattr.so.1.1.0
7fa6777b0000-7fa6777b7000 r-xp 00000000 08:01 15749013 /usr/lib/libfam.so.0.0.0
7fa6777b7000-7fa6779b6000 ---p 00007000 08:01 15749013 /usr/lib/libfam.so.0.0.0
7fa6779b6000-7fa6779b7000 r--p 00006000 08:01 15749013 /usr/lib/libfam.so.0.0.0
7fa6779b7000-7fa6779b8000 rw-p 00007000 08:01 15749013 /usr/lib/libfam.so.0.0.0
7fa6779b8000-7fa6779bf000 r-xp 00000000 08:01 21495822 /lib/libacl.so.1.1.0
7fa6779bf000-7fa677bbe000 ---p 00007000 08:01 21495822 /lib/libacl.so.1.1.0
7fa677bbe000-7fa677bbf000 r--p 00006000 08:01 21495822 /lib/libacl.so.1.1.0
7fa677bbf000-7fa677bc0000 rw-p 00007000 08:01 21495822 /lib/libacl.so.1.1.0
7fa677bc0000-7fa677bce000 r-xp 00000000 08:01 15749116 /usr/lib/gnome-vfs-2.0/modules/libfile.so
7fa677bce000-7fa677dcd000 ---p 0000e000 08:01 15749116 /usr/lib/gnome-vfs-2.0/modules/libfile.so
7fa677dcd000-7fa677dce000 r--p 0000d000 08:01 15749116 /usr/lib/gnome-vfs-2.0/modules/libfile.so
7fa677dce000-7fa677dcf000 rw-p 0000e000 08:01 15749116 /usr/lib/gnome-vfs-2.0/modules/libfile.so
7fa677dcf000-7fa677e2f000 rw-s 00000000 00:04 21397581 /SYSV00000000 (deleted)
7fa677e2f000-7fa677e6e000 r-xp 00000000 08:01 15767465 /usr/lib/libibus.so.1.0.0
7fa677e6e000-7fa67806e000 ---p 0003f000 08:01 15767465 /usr/lib/libibus.so.1.0.0
7fa67806e000-7fa678070000 r--p 0003f000 08:01 15767465 /usr/lib/libibus.so.1.0.0
7fa678070000-7fa678071000 rw-p 00041000 08:01 15767465 /usr/lib/libibus.so.1.0.0
7fa678071000-7fa678072000 rw-p 00000000 00:00 0
7fa678075000-7fa67808f000 r--p 00000000 08:01 16142928 /usr/share/fonts/truetype/thai/Norasi.ttf
7fa67808f000-7fa678096000 r--p 00000000 08:01 16142464 /usr/share/fonts/truetype/ttf-larabie-straight/xtraflex.ttf
7fa678096000-7fa67809b000 r-xp 00000000 08:01 15767488 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7fa67809b000-7fa67829b000 ---p 00005000 08:01 15767488 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7fa67829b000-7fa67829c000 r--p 00005000 08:01 15767488 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7fa67829c000-7fa67829d000 rw-p 00006000 08:01 15767488 /usr/lib/gtk-2.0/2.10.0/immodules/im-ibus.so
7fa67829d000-7fa6782fd000 rw-s 00000000 00:04 21364810 /SYSV00000000 (deleted)
7fa6782fd000-7fa67837d000 r--p 00000000 08:01 15764755 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Oblique.ttf
7fa67837d000-7fa67843e000 rw-p 00000000 00:00 0
7fa67843e000-7fa678482000 r--p 00000000 08:01 6553738 /usr/share/fonts/truetype/msttcorefonts/Arial.ttf
7fa678482000-7fa6784d1000 r--p 00000000 08:01 15742576 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono.ttf
7fa6784d1000-7fa6784d7000 r-xp 00000000 08:01 15748794 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
7fa6784d7000-7fa6786d6000 ---p 00006000 08:01 15748794 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
7fa6786d6000-7fa6786d7000 r--p 00005000 08:01 15748794 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
7fa6786d7000-7fa6786d8000 rw-p 00006000 08:01 15748794 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-xpm.so
7fa6786d8000-7fa678770000 r--p 00000000 08:01 15742574 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
7fa678770000-7fa678772000 r-xp 00000000 08:01 15748701 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7fa678772000-7fa678971000 ---p 00002000 08:01 15748701 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7fa678971000-7fa678972000 r--p 00001000 08:01 15748701 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7fa678972000-7fa678973000 rw-p 00002000 08:01 15748701 /usr/lib/pango/1.6.0/modules/pango-basic-fc.so
7fa678973000-7fa678978000 r-xp 00000000 08:01 15748786 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7fa678978000-7fa678b77000 ---p 00005000 08:01 15748786 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7fa678b77000-7fa678b78000 r--p 00004000 08:01 15748786 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7fa678b78000-7fa678b79000 rw-p 00005000 08:01 15748786 /usr/lib/gtk-2.0/2.10.0/loaders/libpixbufloader-png.so
7fa678b7d000-7fa678c09000 r--p 00000000 08:01 15742575 /usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf
7fa678c09000-7fa678c0c000 r--p 00000000 08:01 15740360 /usr/share/locale-langpack/nl/LC_MESSAGES/atk10.mo
7fa678c0c000-7fa678c0d000 r--s 00000000 08:01 27796411 /var/cache/fontconfig/26de28bc8622bbc1fb67fd234c21975f-le64.cache-3
7fa678c0d000-7fa678c11000 r--s 00000000 08:01 27794238 /var/cache/fontconfig/5e10083637a12ecd1bff191eb66bfa2f-le64.cache-3
7fa678c11000-7fa678c12000 r--s 00000000 08:01 27796397 /var/cache/fontconfig/c05880de57d1f5e948fdfacc138775d9-le64.cache-3
7fa678c12000-7fa678c16000 r--s 00000000 08:01 27794236 /var/cache/fontconfig/603b2eb47209ddb3c5269b217a306167-le64.cache-3
7fa678c16000-7fa678c1f000 r--s 00000000 08:01 27793302 /var/cache/fontconfig/945677eb7aeaf62f1d50efc3fb3ec7d8-le64.cache-3
7fa678c1f000-7fa678c20000 r--s 00000000 08:01 27794227 /var/cache/fontconfig/0fafd173547752dce4dee1a69e0b3c95-le64.cache-3
Emergency save activated!