https://bugs.kde.org/show_bug.cgi?id=447126

            Bug ID: 447126
           Summary: [transparency mask] Crash after importing a picture as
                    a "new layer" and then creating a "transparency mask"
                    over it
           Product: krita
           Version: nightly build (please specify the git hash!)
          Platform: Appimage
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: Tile manager
          Assignee: krita-bugs-n...@kde.org
          Reporter: i...@davidrevoy.com
  Target Milestone: ---

Created attachment 144622
  --> https://bugs.kde.org/attachment.cgi?id=144622&action=edit
Backtrace of the bug

Hi, it's a bug I discussed on IRC and where dmitryK built a appimage with ASAN
for helping me to detect.

To reproduce:
===========
1. Open Krita, create a new document
2. Drag'n'drop an external jpg (or a kra, png) picture from file browser into
the canvas , and choose → insert as a new layer.
3. Then right click on the layer of the imported picture and select on the
menu: Add → Add a Transparency Mask.

Result:
======
A dialog appears: SAFE ASSERT (krita): "qAbs(row) < 0x7FFF && qAbs(col) <
0x7FFF" in file
/home/appimage/persistent/krita/libs/image/tiles3/kis_tile_hash_table2.h, line
151 

It looks like that:
https://www.peppercarrot.com/extras/temp/2021-12-17_screenshot_114756_net.jpg  

Info:
====
A backtrace is attached to this report and it's 100% reproducable. 
The appimage is 2021-12-17_krita-5.1.0-prealpha-7793838-ASAN-x86_64.appimage ,
from Krita git~master. It was tested in a vanilla new environment, Kubtuntu
Linux 20.04LTS.

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