(Fabrice) : alternative repro, use DOTSlab here
https://dotslab.cds.internal.unity3d.com/?s=pZJNT8MwDIbvlfoffOwk1N1hmzRgoJ2GxtfZpN4WkSVV4g4mtP%2bO02xlAyQORG0UOa%2ftx46boO0SHq3mbTmxrFlTuMizpjUHRtbq2215vw1M6%2fHdVHR5VjcvRjQ1etZoQBkMAR4ocJLBOaTDJQbKs488A1m1d0yKqQK3Ie91RbBxuoKZfawrZCp6SSfydIhOB7wvS7SWz5pXY2MGD7i8cuvaWbI8OgSIirjKG%2bcnqFZF0UbZgoik5B4MR6fh9oDJK%2b39vrYhIrpFxwDKWaZ3PoNb4i7tfAYrDIByu661IZDanIc3IXQNA73X0irNoNCYfVukjeUpQUza74OnhfxYOWu2sEHfxmyLg2F72T1DeYowiM3vkEbFvtLyCU1D85k82nFxKRs7UCtSrwn4p%2bJPmP8g7HrlvLFFT8hS5l2eydeNVmDfKIbj95WpmnYlXiNjO1m%2fOR334nev2IH9EC%2bMQ4bg1hRjCs%2fuEw%3d%3d&resultType=CSharp

How to reproduce:
1. Open the “1709269_Entities_test” project
2. Open the “Assets/WireframeBlob/TestSystem.cs” script
3. Comment out line 14 and uncomment line 16
4. Save the script
5. Observe the Console

Expected result: No error is thrown
Actual result: “The name '__this' does not exist in the current context” error is thrown

Reproduced on: 1.0.16, 1.2.0-exp.3 (2022.3.14f1)

Reproduced with: Windows 10 (by reporter), Windows 11
Not reproduced with: No other environment tested