Bug 318783

Summary:	Seg fault when creating new puzzle from a monochrome PNG file
Product:	[Applications] palapeli	Reporter:	Peter Hillier-Brook <phb>
Component:	general	Assignee:	Stefan Majewsky <majewsky>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	cfeck, iandw.au, kde-games-bugs, phb
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Other
OS:	Other
Latest Commit:		Version Fixed In:
Attachments:	Backtrace from crash Greyscale image that fails predictably

Description Peter Hillier-Brook 2013-04-23 22:25:17 UTC

When trying to create a new puzzle from a monochrome PNG file Palapeli crashes every time. File size is 97.6 KB

Reproducible: Always

Steps to Reproduce:
1.Perform the above
2.
3.



OS is Kubuntu 12.10, fully up to date running on a quad core AMD system

Comment 1 Christoph Feck 2013-04-24 01:03:36 UTC

This should be fixed with KDE 4.9.3, see bug 236625.

If you use KDE 4.9.3 or later, please add the backtrace for the crash. For more information, please see http://techbase.kde.org/User:DarioAndres/Basic_Guide_about_Crash_Reporting

*** This bug has been marked as a duplicate of bug 236625 ***

Comment 2 Peter Hillier-Brook 2013-04-24 14:18:50 UTC

Running KDE 4.10.2 (64 bit) from backports. Palapeli is 1.2 and apparently there is no debug package so backtrace is not feasible. Any advice will be followed.

Comment 3 Jekyll Wu 2013-04-24 14:26:22 UTC

(In reply to comment #2)
> apparently there is no debug package so backtrace is not feasible

Well, no debug package means the backtrace can't be as good as possible, but a imperfect backtrace is way more useful than no backtrace at all. 

So backtrace please. Or attach that problematic image as a test case.

Comment 4 Peter Hillier-Brook 2013-04-24 16:44:30 UTC

OK. The crash reporter wouldn't progress without the debug information, but I hadn't noticed the file save option so I've attached the backtrace this time. The image is subject to copyright - not mine - but i'll try to find another.

Comment 5 Peter Hillier-Brook 2013-04-24 16:46:08 UTC

Created attachment 79418 [details]
Backtrace from crash

Comment 6 Peter Hillier-Brook 2013-04-26 15:14:59 UTC

I've converted to greyscale a coloured image that works fine in Palapeli. The greyscale image fails predictably, which should narrow down the bug hunting to a greyscale related area. For reference I'm attaching the greyscale image.

Comment 7 Peter Hillier-Brook 2013-04-26 15:16:07 UTC

Created attachment 79466 [details]
Greyscale image that fails predictably

Comment 8 Ian Wadham 2013-04-27 00:13:13 UTC

FWIW I was able to create a greyscale puzzle from this image using 100 rectangular pieces. When I selected normal piece-slicing, Palapeli vanished without any crash or backtrace. This was on an Apple Macbook using a Macports port of Palapeli 1.2 for KDE 4.10.1.

Solving the puzzle worked well and finished correctly. It looks as though some slicers are working with greyscale but not others.

Sorry for the noise, I made this comment on the wrong bug report before.

Comment 9 Christoph Feck 2013-04-27 00:15:25 UTC

Crash is deep in Qt, will investigate this.

Comment 10 Christoph Feck 2013-04-27 00:25:36 UTC

Reopened original bug, the fix was at the wrong place.

*** This bug has been marked as a duplicate of bug 236625 ***

Comment 11 Peter Hillier-Brook 2013-04-27 11:51:46 UTC

Apologies for not mentioning earlier: the puzzle I was attempting to create was Classic Jigsaw Pieces with 256 pieces. I hope this helps.

Comment 12 Peter Hillier-Brook 2013-04-30 22:01:45 UTC

A quick update. I passed the failing original greyscale image through the GIMP and made a copy with RGB encoding. This copy causes no problems with Palapeli and makes a nice, monochrome jigsaw.