Inkscape crashes when I try to modify a specific group

[John Harrold]

Howdy,

 Here is a stripped down version of an svg file I'm working on where I can consistently crash inkscape.

http://dl.dropbox.com/u/1901170/Temp/crashing%20inkscape/inkscape%20crash.svg

Here is a movie file showing what I have to do to crash inkscape:

http://dl.dropbox.com/u/1901170/Temp/crashing%20inkscape/crashing%20inkscape.mov

To recreate: In the figure there are two cone regions with ovals in the cones. If I click on the grouped ovals on the right and try to ungroup them, then inkscape crashes (the video shows this).

This is consistent and reproducible on my computer at least.

I'm not exactly sure what It is about this svg file, but I think it has something to do with the vertical dotted lines in the figure.

OS: OS X 10.5.8
X11: 2.1.6
Inkscape version: Inkscape 0.47 r22583, built Nov 24 2009

[su_v (suv-lp)]

Can you please add information about your OS/platform and Inkscape version as well as a list of steps how to reproduce the crash?

[su_v (suv-lp)]

crash reproduced with Inkscape 0.47+devel r9405 on OS X 10.5.8

no relevant console messages, backtrace in attached crash report

<possibly off-topic>
Some notes to your file without knowing yet what really causes the crash: is there a special reason to use the 'Spiro' path effect for all the straight lines? Same question for the 'Pattern along Path' effect: you can easily draw dashed lines by setting the stroke attributes in the 'Fill and Stroke...' dialog instead of using 'Pattern along Path' path effect.
</possibly off-topic>

[John Harrold (john-m-harrold)]

Hey suv,

No reason in particular, I used the spiro effect once and it somehow got set to default. I didn't notice it until you pointed it out. I don't know if it will help, but here is the crash log from my mac.

[su_v (suv-lp)]

Workaround for your current document: double-click to enter the group in question, select all vertical lines and use menu 'Path > Remove Path Effect'. After this you can ungroup the group without crash.

[John Harrold (john-m-harrold)]

That works, and I changed the default mode back to regular Bezier path. Thanks suv, and I hope that my inattentiveness produced something that can help you folks out :)

[su_v (suv-lp)]

It might also be worthwhile to change the 'Shape:' option from (I guess) 'From clipboard' back to 'None' - the paths in your document use a shape (a small 1px long horizontal line) as 'Single, stretched' pattern which is kind of redundant unless you need to adjust the width independent from the stroke width attribute or need the stroke rendered offset from the center line (using the 'Normal offset' parameter).

[Johan Engelen (johanengelen)]

The crash happens in LivePathEffectObject::fork_private_if_necessary (from a more detailed backtrace)

[Johan Engelen (johanengelen)]

This is strange:

"inkscape.com crash.svg" --> no crash on ungrouping

"inkscape.exe crash.svg" --> no crash

Run gdb,
   file inkscape.exe inkscape.dbg
   r crash.svg
--> CRASH on ungroup

I'm lost...
And one of the problems is, debug output does not show (g_message) when running inkscape in gdb.

[Johan Engelen (johanengelen)]

The problem was forking of LPE stacks (2 or more LPEs).
Fixed it.

[su_v (suv-lp)]

fix confirmed with Inkscape 0.47+devel r9419 on OS X 10.5.8

thanks Johan! :)