Bug 369095

Summary:	Lazybrush assertion when a key stroke has 0 opacity
Product:	[Applications] krita	Reporter:	Nicholas LaPointe <nicholaslapointe8>
Component:	Filter Layers	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal
Priority:	NOR
Version:	git master (please specify the git hash!)
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:	http://commits.kde.org/krita/87bb1079c1aa68ed4334f1618161b4d9c1a4887d	Version Fixed In:
Attachments:	Document with 0 opacity stroke Document without 0 opacity stroke

Description Nicholas LaPointe 2016-09-20 02:47:32 UTC

Adding a key stroke that has 0 opacity and then updating the colorize mask will sometimes cause Krita to exit with the following assertion:
"m_mainArea.contains(m_bLabelArea)" in file src/libs/image/lazybrush/kis_lazy_fill_graph.h, line 360

I am unable to reliably repeat this using any arbitrary image, but it always happens with lazybrush_assert_with0opacity.kra for me. lazybrush_assert_before0opacity.kra is the same file, but without the 0 opacity stroke.

Reproducible: Sometimes

Steps to Reproduce:
Using lazybrush_assert_with0opacity.kra
1. Update colorize mask

Using lazybrush_assert_before0opacity.kra
1. Add a stroke to the colorize mask using 0 opacity
2. Update colorize mask

Comment 1 Nicholas LaPointe 2016-09-20 02:48:33 UTC

Created attachment 101194 [details]
Document with 0 opacity stroke

Comment 2 Nicholas LaPointe 2016-09-20 02:48:56 UTC

Created attachment 101195 [details]
Document without 0 opacity stroke

Comment 3 Dmitry Kazakov 2016-09-21 14:03:26 UTC

Git commit 87bb1079c1aa68ed4334f1618161b4d9c1a4887d by Dmitry Kazakov.
Committed on 21/09/2016 at 14:03.
Pushed by dkazakov into branch 'master'.

Fix crash in Colorize Mask when painted with 0 opacity

Well, there is no reason to try to fill empty scribbles
Fixes T3811

M  +12   -0    libs/image/lazybrush/kis_multiway_cut.cpp

http://commits.kde.org/krita/87bb1079c1aa68ed4334f1618161b4d9c1a4887d