(Crash) issue when saving radial gradient to EMF/WMF

[Patrick Storz]

Export of documents containing radial gradients to EMF/WMF fails with certain settings.
It also brings Inkscape into a state where it is likely to crash.

Steps to reproduce:
- open testcase.svg
- Choose "Save as" and select EMF or WMF
- Click "Save" and be sure to mark "Convert gradients to colored polygons series"
-> Inkscape notifies the user that "File [...] could not be saved"
- Click close, then highlight the rectangle in the document and delete it
-> Inkscape crashes ("Inkscape encountered an internal error and will close now.")

This crash is reproducible with Inkscape 0.91 stable as well as Inkscape trunk (r14666) on Windows 7 x64.

[jazzynico (jazzynico)]

Reproduced on Windows XP, Inkscape trunk rev. 14666, when "Convert gradients to colored polygons series" is selected.

Inkscape crashes when deleting or moving the rectangle, with the following error message:

Program received signal SIGSEGV, Segmentation fault.
0x0050d929 in Inkscape::DrawingItem::setTransform(Geom::Affine const&) ()

As often, no useful backtrace on Windows...

[jazzynico (jazzynico)]

Sometimes I get a different error message:

0x0051771c in Inkscape::Drawing::outline() const ()

Note that radial gradients are not affected.

[jazzynico (jazzynico)]

Also reproduced on Xubuntu 15.10, Inkscape 0.91 and trunk rev. 14707.

[jazzynico (jazzynico)]

Three different GDB backtraces. They all share the same trace up to SPShape::update and then differ a bit (the crash happens each time in a different part of the code).

[Patrick Storz (ede123)]

Fixed in
http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/15568 and
http://bazaar.launchpad.net/~inkscape.dev/inkscape/0.92.x/revision/15401 respectively.