Confusing undo steps limit behavior #76642

New Issue

Sergey Sharybin · 2020-05-11T12:22:52+02:00

Sergey Sharybin commented

2020-05-11 12:22:52 +02:00

System Information
Operating system: Linux-5.6.0-1-amd64-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.82

Blender Version
Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-05-11 09:45, hash: 672a0af081
Worked: Was always somewhat confusing, even in 2.79

Short description of error

Limiting undo steps have an unexpected behavior, especially when mixing object/edit mode: it will allow to undo more steps than configured. For example, with 2 steps configured in the settings, it is possible to undo 3 steps in edit mode.

On top of that the last step seems to undo everything, bringing file to the opened state. Not sure what is the motivation behind this, but it feels confusing at least and might as well be dangerous.

Was actually pointed out by Max Dmitrichenko (@maxim_d33). Tried to dig into the code, but didn't really find any answers there.

Exact steps for others to reproduce the error

Open blender
Configure 2 undo steps in the preferences
Go to default cube's edit mode
Move all vertices 5 times
Start hitting undo: is it possible to undo 3 movement operations. Undoing one more time kicks out of edit mode, seemingly returning to the state when file was open.

**System Information** Operating system: Linux-5.6.0-1-amd64-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.82 **Blender Version** Broken: version: 2.90 (sub 0), branch: master, commit date: 2020-05-11 09:45, hash: `672a0af081` Worked: Was always somewhat confusing, even in 2.79 **Short description of error** Limiting undo steps have an unexpected behavior, especially when mixing object/edit mode: it will allow to undo more steps than configured. For example, with 2 steps configured in the settings, it is possible to undo 3 steps in edit mode. On top of that the last step seems to undo everything, bringing file to the opened state. Not sure what is the motivation behind this, but it feels confusing at least and might as well be dangerous. Was actually pointed out by Max Dmitrichenko (@maxim_d33). Tried to dig into the code, but didn't really find any answers there. **Exact steps for others to reproduce the error** - Open blender - Configure 2 undo steps in the preferences - Go to default cube's edit mode - Move all vertices 5 times - Start hitting undo: is it possible to undo 3 movement operations. Undoing one more time kicks out of edit mode, seemingly returning to the state when file was open.

Sergey Sharybin commented

2020-05-11 12:22:52 +02:00

Added subscribers: @maxim_d33, @Sergey