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Text Editor Undo bugs
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Description

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: Intel(R) UHD Graphics 600 Intel 4.5.0 - Build 24.20.100.6137

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-06-26 19:03, hash: rB155c62b070a9
Worked: (optional)

Short description of error
The Text Editor's undo is working unreliable. One case is reported here: T65909
This is two other cases.

Exact steps for others to reproduce the error

  1. Start a new text block
  2. Type “1234567890”
  3. Run script
  4. Undo once (all the text should disappear)
  5. Undo four more times
  6. Now redo once

Essentially blender fails to correctly restore the undo steps, but somehow is able to redo. Same thing in this case:

  1. Type 1234567890
  2. In 3D View grab and move ex. a cube.
  3. Move mouse cursor into text editor.
  4. Hit undo.
  5. The cube will be moved back.
  6. Hit undo.
  7. Only the last typed character will be removed.
  8. Can’t undo anymore.
  9. Hit redo
  10. Some more characters are removed.
  11. Hit redo until 1234567890 are restored.

Details

Type
Bug