How to reproduce:
1. Open Unity
2. Create a new project with name "Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Test Te" (make sure that Project Name field is filled up till the end)
3. Receive Unity Package Manager Error and press continue
4. Unity crashes and must be killed with task manager because repeating 2 step is not working now because of multiple Unity instances

Expected result: A new project should be created
Actual result: Unity crashes and the new project is not created

Regression first introduced in:
Reproducible with: 2018.2.0a4, 2018.1.0b11, 2017.3.1p4, 2017.2.2f1, 2017.1.3p2, 5.6.5p2
Not reproducible with:

Note:
2017.3.1p4, 2017.1.3p2, 5.6.5p2 gives Failed to load windows layout error
2017.2.2f1 crashes instantly