https://bugs.kde.org/show_bug.cgi?id=443306
Bug ID: 443306
Summary: Masked brushes randomly stop working
Product: krita
Version: git master (please specify the git hash!)
Platform: Other
OS: Linux
Status: REPORTED
Keywords: regression
Severity: normal
Priority: NOR
Component: Brush engines
Assignee: krita-bugs-n...@kde.org
Reporter: lynx.mw+...@gmail.com
Target Milestone: ---
SUMMARY
Various brushes randomly stop working and print console errors:
QSqlDatabasePrivate::database: requested database does not belong to the
calling thread.
QSqlQuery::prepare: database not open
Could not prepare KisAllResourcesModel query for resource md5 QSqlError("",
"Driver not loaded", "Driver not loaded")
Could not select "brushes" resources by md5 QSqlError("", "Driver not loaded",
"Driver not loaded") QMap()
The thing they seem to have in common is a masked brush tip, so it's probably
related to that.
STEPS TO REPRODUCE
1. Paint with a masked brush, here it happens most quickly with "m) RGBA 04
Impasto" and "m) RGBA 05 Impasto-details", but e.g. the "j) WaterC Spead *"
brushes can cause it too
2. If nothing happened yet, try chaning some parameter like size, masked brush
tip etc. and paint again
3. If it still didn't happen, try reloading the preset, paint again, and
possibly repeat step 2
OBSERVED RESULT
Sooner or later, above error messages show up in console and brushes randomly
fail to paint correctly.
ADDITIONAL INFORMATION
Know to happen with master at e5f10d40b1c5a926e39dff3655b573d00ffef776 compiled
on Ubuntu 20.04, Qt 5.15.3, aswell as nightly
krita-5.0.0-beta1-7109bd4-x86_64.appimage.
The initial krita-5.0.0-beta1-x86_64.appimage seems not affected, so it must be
something recent.
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