Image sequence paint undo: freezes blender (bug 1) or looses changes (bug 2) #39156

New Issue

Michael P. · 2014-03-13T14:33:07+01:00

Michael P. commented

2014-03-13 14:33:07 +01:00

System Information
Windows 7 64bit
NVIDIA GeForce GTX 760

Blender Version
Broken: blender-2.70-RC2-windows64

Short description of error
Image sequence paint undo: freezes blender (bug 1) or looses changes (bug 2).

Exact steps for others to reproduce the error
Please use the attached zip file. It includes a blend file and an image sequence.
{F80961}

There are two undo issues here.

Preparing the test for both issues:

open file
paint one simple stroke
in the "Image" panel to the right increase the "Offset" value, so you get the next image
repeat 2. and 3. until you have painted three images

Bug 1 - Blender freezes if the user makes to many undo operations:

you have prepared the test as described above
undo (CTRL + Y) several times (more than three times)

Blender freezes

Please reopen the file and prepare the test again.

Bug 2 - History undo looses changes made to images:

you have prepared the test as described above
call the undo history (CTRL + ALT + Y)
you should see three times "Image paint" and one "original" entry
select the second "Image paint" from above
go to the "Image" panel on the right side
decrease the "Offset" value and you can see that all changes are gone

**System Information** Windows 7 64bit NVIDIA GeForce GTX 760 **Blender Version** Broken: blender-2.70-RC2-windows64 **Short description of error** Image sequence paint undo: freezes blender (bug 1) or looses changes (bug 2). **Exact steps for others to reproduce the error** Please use the attached zip file. It includes a blend file and an image sequence. {[F80961](https://archive.blender.org/developer/F80961/2014-03-13-paint-undo-crash-freeze.zip)}![2014-03-13-paint-undo-crash-freeze.jpg](https://archive.blender.org/developer/F80962/2014-03-13-paint-undo-crash-freeze.jpg) There are two undo issues here. Preparing the test for both issues: - open file - paint one simple stroke - in the "Image" panel to the right increase the "Offset" value, so you get the next image - repeat 2. and 3. until you have painted three images Bug 1 - Blender freezes if the user makes to many undo operations: - you have prepared the test as described above - undo (CTRL + Y) several times (more than three times) # Blender freezes Please reopen the file and prepare the test again. Bug 2 - History undo looses changes made to images: - you have prepared the test as described above - call the undo history (CTRL + ALT + Y) - you should see three times "Image paint" and one "original" entry - select the second "Image paint" from above - go to the "Image" panel on the right side - decrease the "Offset" value and you can see that all changes are gone

Michael P. commented

2014-03-13 14:33:07 +01:00

Changed status to: 'Open'

Michael P. commented

2014-03-13 14:33:07 +01:00

Added subscriber: @MichaelParucha

Thomas Dinges commented

2014-03-13 17:58:38 +01:00

Added subscribers: @Psy-Fi, @ThomasDinges

Thomas Dinges commented

2014-03-13 17:58:38 +01:00

Antony, can you please check if this is a Blender 2.7 regression?

Antonis Ryakiotakis commented

2014-03-13 19:14:29 +01:00

It's not a regression, it is an old bug, still it would be good to have it included for 2.70. Fix is local, small and impossible to go wrong and it is a deadlock after all. Luckily it should only affect painting. The second bug is more general and it does not only affect image sequences. Other modes that use a local undo stack (sculpt, paint) suffer from lack of undo history support. I will attempt a fix but looks like it's more like a to-do.