How to reproduce:
1. Open attached project "731472-ParticlesCrash.zip" and scene "SampleScene"
2. Enter Play mode
3. In Game view, every ~1s press on different button (either "flat", "mesh->standard" or "standard->mesh") or press on "mesh->standard" button and wait

Expected result: the Editor should never crash
Actual result: the Editor crashes

Reproducible with: 2018.4.9f1, 2019.2.10f1, 2019.3.0b9, 2020.1.0a11
Could not test with: 2017.4.34f1 (UI not working, package manager errors)

Additional notes:

• It seems not to reproduce on faster computers (or at least way less often)
• The reproduction is very inconsistent but usually after the first crash on the same project the issue reproduces quicker