## FuUndo stack broken / bugged

svenneve
Fusioneer
Posts: 92
Joined: Fri Sep 12, 2014 1:47 am
Been thanked: 1 time
Contact:

### Undo stack broken / bugged

Fusion version:
Fu16 b1 + b2

OS and version:
Windows 10 1809 (17763.437)

Description of the bug:
Changing values in inspector on say a Merge tool and then undo-ing, often results in undo skipping changes on certain values (Angle for example)

Severity (Trivial, Minor, Major, Critical)
Major

Steps to reproduce:
Create a Merge, change Center / Size / Angle values in Inspector (mix dragging slider, sliding numbers, typing values) try to undo to creation of tool, 9/10 times the Angle value does not reset to it's initial value of 0.

Please, if possible, provide a Fusion setup to help demonstrate the behaviour, either as an attachment or between [code] tags:
Create a Merge, use the tool.

JPDoc
Fusioneer
Posts: 181
Joined: Tue Sep 02, 2014 8:26 am
Been thanked: 1 time

### Re: Undo stack broken / bugged

Very nice to see BMD picking up on this so quickly, as it seems like such a major bug - see
http://forum.blackmagicdesign.com/viewt ... 22&t=90842

SecondMan
Posts: 3367
Joined: Thu Jul 31, 2014 5:31 pm
Been thanked: 65 times
Contact:

### Re: Undo stack broken / bugged

Good find! It gets quirky. It seems that the way you're changing the controls matters...

When you change the values using the usual controls, undo seems to work, but when you use the weird click-drag value boxes more than once, the undo stack doesn't build. Or something. In the below video, watch me change a parameter and using CTRL-Z once after every step to try to undo what I've done: