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Summary:

Clicking with the graphic tablet pen crashes these softwares : Inkscape 1.0.2, Gimp 2.99.4, MyPaint 2.0.1.
The use of these software is impossible with a graphic tablet.
This issue looks like a gtk bug.

Everything works perfectly with Inkscape 0.92.5, or Gimp 2.10.24. No issue in this case.

Steps to reproduce:

1 - Open software and create a new document
2 - Click with the pen of the graphic tablet and the software crashes

What happened ?

The move of the pen is Ok
A simple click of the pen trigger software crash

Here is the command prompt when Gimp v2.99.4 starts :

Here is the command prompt just after the crash of Gimp v2.99.4 :

Weblink to issues which seems identical

• Issue for Inkscape 1.0.2
• Issue for MyPaint 2.0.1

Version Info :

- Windows 10 Pro x64 20H2 19042.867
- Inkscape v1.0.2 (e86c870879, 2021-01-15, custom)
- Gimp 2.99.4
- MyPaint 2.0.1
- Graphic Tablet : Gaomon M10K2018, Gaomon software V16.0.0.21 (2021-01-04), Driver 7.1.7610.16485 (2018-11-02) 

Backtrace when Inkscape 1.0.2 crashes

Backtrace when Inkscape 1.0.2 crashes - inkscape_backtrace.txt

I remain at your disposal for any further information