https://bugs.kde.org/show_bug.cgi?id=451903
Bug ID: 451903
Summary: UBSan hits on a signed integer left-shift in
KisFixedPoint
Product: krita
Version: git master (please specify the git hash!)
Platform: Compiled Sources
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: General
Assignee: krita-bugs-n...@kde.org
Reporter: a...@amyspark.me
Target Milestone: ---
Created attachment 147730
--> https://bugs.kde.org/attachment.cgi?id=147730&action=edit
Backtrace of breakpoint
SUMMARY
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***
Running Krita with UBSan on the xsimd preparation branch yields a lot of UBSan
errors. The only one I could not fix is:
/home/amalia/krita/src/libs/image/kis_fixed_point_maths.h:22:20: runtime error:
left shift of negative value -2
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior
/home/amalia/krita/src/libs/image/kis_fixed_point_maths.h:22:20 in
STEPS TO REPRODUCE
1. Build Krita with `ECM_ENABLE_SANITIZER` set in CMake to `undefined`.
2. Run Krita and start painting.
OBSERVED RESULT
None, just the UBSan report.
EXPECTED RESULT
None.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
d47a33aa9c
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