Crash after Group Object to Symbol -> Undo -> Same Object to Symbol

[Hachmann]

Inkscape crashes reproducibly without error message / emergency save when I do this:

1. Group any objects
2. Select, press 'Add symbol from the current document' in Symbol dialog
3. Undo (because I noticed I need to change something - color, for example)
3a. Optionally: change style of elements
4. Select group again
5. 'Add symbol from the current document' again
6. Crash.

Inkscape 0.91, LM 17.2 (Ubuntu 14.04 base, official repo), 64bit

[su_v (suv-lp)]

Reproduced (crash including lack of emergency save) with Inkscape 0.91 r13725 and 0.91+devel r14341 on OS X 10.7.5:

(inkscape:56570): glibmm-ERROR **:
unhandled exception (type std::exception) in signal handler:
what: basic_string::_S_construct NULL not valid

Based on tests with archived builds:
- not reproduced with rev <= 13056,
- reproduced with rev >= 13058;
the crash was possibly exposed as side-effect of the changes in rev 13057:
Revision 13057: Rewrite of symbol creation code. Partial fix for 1201325.
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/13057

[Mc (mc...)]

fix pushed to r14343/14344

[Hachmann (marenhachmann)]

Wow - that was fast :) Thx, Mc!

[su_v (suv-lp)]

Mc - any chance you could help with backporting the fix to 0.91.x? (std::string vs Glib::ustring differences between the two branches ...)

[su_v (suv-lp)]

Fix backported to 0.91.x in rev 13826.