Make object -> Apply certain filters -> Open filter editor -> Undo -> Crash

[Jesse Millikan]

Inkscape 0.47 r22583, built Nov 21 2009
Windows XP SP3

- New Document
- Draw anything that "Blueprint"/similar filters will show a result for
 - Import bitmap
 OR
 - Draw new ellipse & set fill and stroke different
 - Set fill color to greenish (e.g.)
 - Set stroke color to reddish (e.g.)
 OR
 - Draw cube
- Apply "Blueprint" effect to object (or several other filters, see below; all seem to use Color Matrix and Convolve Matrix)
- Bring up filter editor via menu
- Ctrl-z to undo filter
- Crash
 - While crash dialogues are on screen, the lowermost item in the filter editor ("Color Matrix") has dissappeared
   leaving "Convolve Matrix" on top, and the image is changed

- Variations that DON'T crash:
 - Does NOT crash if you bring up filter editor before applying filter even if you close it before applying
 - Does NOT crash for ellipse if fill and stroke are the same (Blueprint produces nothing in that case...)
 - Does not appear to crash with SOME other filters - "Drawing", "Film Grain"

- Variations that DO crash:
 - crashes with similar filters - "Edge Detect", "Horizontal Edge Detect", "Pencil", "Sharpen More"
 - crashes if you take at least some other actions (I tried drawing a rectangle), as long as you undo back to the filter
 - If you apply a second filter, crashes after 2 undos (undoing the first filter)

[su_v (suv-lp)]

reproduced with Inkscape 0.47 and 0.47+devel r9433 on OS X 10.5.8

[su_v (suv-lp)]

crash log (including bt) from 0.47+devel r9433

[su_v (suv-lp)]

steps used to reproduce the crash:
1) open document containing an ellipse with different fill and stroke paint
3) apply 'Filters > Image effects > Blueprint'
4) open Filter Editor
5) undo

[jazzynico (jazzynico)]

Reproduced on Windows XP, Inkscape trunk revision 11562.

Crashes with the following console message:
ERROR:src/ui/widget/attr-widget.h:103:char* Inkscape::UI::Widget::DefaultValueHolder::as_charptr(): assertion failed: (t
ype == T_CHARPTR)

[jazzynico (jazzynico)]

Patch tested on Windows XP only, Inkscape trunk revision 11575.

[jazzynico (jazzynico)]

Tested on Ubuntu 11.04 and committed revision 11582.

[jazzynico (jazzynico)]

Backported to the branch, revision 9925.