Bug 421708

Created attachment 128561 [details]
A .kra file where I see the phantom pixels

SUMMARY
I have a workflow that somewhat frequently creates images with "phantom pixels." These are parts of a drawing that were in my clipboard and which appear on the canvas, but which can't be deleted. They don't appear as part of any layer and they can't be removed from the file. I have to make a new file to get rid of them. The pixels can't be selected or made invisible, but the eyedropper tool is aware of them. The move tool can't move them, the pixels appear outside the image when cropping, and they appear in front of every other layer.

I don't know the exact steps to reproduce this, but I have a file that's in this corrupted state.

My workflow is generally:

1. Draw in a .kra file over many sessions, filling it with doodles
2. When the file is filled up, go to Save As -> new file, delete all the layers except the background layer, make a new layer, and keep drawing.

Sometimes I'll select parts of the drawing and cut or copy the pixels and paste them into the new version of the file, after saving. This is definitely when the bug happens, but I can't reliably reproduce it. I'm missing some kind of step.



SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Devuan 
$ cat /etc/os-release 
PRETTY_NAME="Devuan GNU/Linux 3 (beowulf)"
NAME="Devuan GNU/Linux"
VERSION_ID="3"
VERSION="3 (beowulf)"
VERSION_CODENAME=beowulf
ID=debian
ID_LIKE=debian
HOME_URL="https://www.devuan.org/"
SUPPORT_URL="https://devuan.org/os/community"
BUG_REPORT_URL="https://bugs.devuan.org/"

$ krita --version
krita 4.2.9

$ dpkg -l | grep plasma-framework
ii  plasma-framework                                   5.54.0-1                            amd64        Plasma Runtime components


$ dpkg -l | grep libqt5core
ii  libqt5core5a:amd64                                 5.11.3+dfsg1-1                      amd64        Qt 5 core module


This has happened on Debian as Ubuntu as well, at least as far back as Krita 4.1.5

The attachment demonstrates two separate instances of this happening in one file. I had pixel data in my clipboard that shows text that says "3/24/20 09:32 PM" (for an unrelated reason), and then last night a doodle. Whatever I try I can't get these drawings out of the image, including deleting layers, adding them, etc.