Bug 393384

Summary:	Moving rectangular selections has bad & un-undoable side effects with alpha transparency
Product:	[Applications] kolourpaint	Reporter:	poseidon <purpleposeidon>
Component:	general	Assignee:	kolourpaint-support
Status:	CONFIRMED ---
Severity:	normal	CC:	martin
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description poseidon 2018-04-22 04:54:56 UTC

1. Create a 100% transparent bitmap.
2. Set the secondary color to something opaque.
3. Make a rectangular selection, and move it.
4. The transparent stuff is filled with the secondary color. This happens with either 'Transparent' or 'Opaque' modes with the selection tool.

Undo doesn't know about the filling side-effect.

This is with v18.07.70 built from source; this bug is old as dirt tho.

It's rather obnoxious. A user can work-around it by just not using transparency.