Sketcher: Polyline generates error and breaks geometry if undoing when drawing

[0penBrain]

Is there an existing issue for this?

• I have searched the existing issues

Problem description

Steps to reproduce:

• Empty sketch
• Polyline tool, draw 2 subsequent segments (default mode)
• Click "Undo" (or hit Ctrl+Z) => 😕 Last segment is removed but the start point of the preview line stays where it was
• Click on the 1st endpoint (as to "close the shape") => ⚠️ A full bunch of errors appears in the Report View

Full version info

OS: Ubuntu 22.04.4 LTS (KDE/plasma)
Word size of FreeCAD: 64-bit
Version: 0.22.0dev.37361 +1 (Git)
Build type: Debug
Branch: myBranch
Hash: 761d8fc69d0d9a67d0a6cd4da8fdb35401c0a7e6
Python 3.10.12, Qt 5.15.3, Coin 4.0.0, Vtk 7.1.1, OCC 7.6.3
Locale: English/United States (en_US)

Subproject(s) affected?

Sketcher

Anything else?

Easier way to trigger the errors but less visual:

• Empty sketch
• Polyline tool, draw a first segment
• Hit Ctrl+Z, then click to create a new segment

Code of Conduct

• I agree to follow this project's Code of Conduct

[maxwxyz]

Duplicate of #9789