Starting any extension on this file will crash inkscape

[Pierre Barbier de Reuille]

I have many files on which I cannot start a single extension. I attach one of those, that I stripped down to two simple shapes.
Note that these files were created with older versions of inkscape. And if I create a file with this version of inkscape, it doesn't seem to be crashing. I can even copy/paste the shapes in the file in attachment in a new file, and it won't crash anymore.

As extensions I tried: Colour->darker, Colour->brighter, Render->LaTeX formula

Version used: Inkscape 0.48.3.1 r9886 (package in debian testing)
OS: Debian testing
Backtrace:
#0 0x000000000080ae15 in Inkscape::Extension::Implementation::Script::effect(Inkscape::Extension::Effect*, Inkscape::UI::View::View*, Inkscape::Extension::Implementation::ImplementationDocumentCache*) ()
#1 0x0000000000b66fad in Inkscape::Extension::ExecutionEnv::run() ()
#2 0x0000000000806d0c in Inkscape::Extension::Effect::effect(Inkscape::UI::View::View*) ()
#3 0x0000000000806e55 in Inkscape::Extension::Effect::prefs(Inkscape::UI::View::View*) ()
#4 0x0000000000846c42 in sp_action_perform(SPAction*, void*) ()
#5 0x00007ffff3e13724 in g_closure_invoke ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#6 0x00007ffff3e247b0 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#7 0x00007ffff3e2c72c in g_signal_emit_valist ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#8 0x00007ffff3e2c8c2 in g_signal_emit ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9 0x00007ffff5b4964e in gtk_widget_activate ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#10 0x00007ffff5a449bd in gtk_menu_shell_activate_item ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#11 0x00007ffff5a44d57 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#12 0x00007ffff5a31538 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#13 0x00007ffff3e13724 in g_closure_invoke ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007ffff3e24530 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#15 0x00007ffff3e2c34b in g_signal_emit_valist ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007ffff3e2c8c2 in g_signal_emit ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007ffff5b4a451 in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#18 0x00007ffff5a2f6c3 in gtk_propagate_event ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#19 0x00007ffff5a2fa23 in gtk_main_do_event ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#20 0x00007ffff569b1ec in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#21 0x00007ffff374b205 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007ffff374b538 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007ffff374b932 in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007ffff5a2ea77 in gtk_main ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#25 0x00000000006ac24b in sp_main_gui(int, char const**) ()
#26 0x00000000006903bf in main ()

[Pierre Barbier de Reuille (pierre-barbierdereuille)]

As a comparison, I also attach a file that contains the exact same shapes, but that doesn't make inkscape crash when launching extensions.

[su_v (suv-lp)]

Crash when applying a script-based extension with 'test.svg':
- reproduced with Inkscape 0.48.3.1 r9886 on OS X 10.7.4
- not reproduced with Inkscape 0.48.3.1 r9900 (recent build from the 0.48.x branch)

-> Linking as duplicate to
Bug #944077 “inkscape crashed with SIGSEGV in Inkscape::Extension::Implementation::Script::effect()”
<https://bugs.launchpad.net/inkscape/+bug/944077>
(fixed in trunk, and backported to 0.48.x in r9893)

Please add a comment here and revert the duplicate status if you don't agree and think these are different issues.