Thanks for the crash report and apologies that you experience this crash. Unfortunately the reports attached do not include any information that would allow us to diagnose the issue.
From what we can tell the Unity crash handler itself crashed and as such did not generate the relevant information. This typically happens when there's a crash caused by the underlying Unity Engine and should be extremely rare.
Because there's no info for us to go off I'll be closing this ticket but please do submit a new ticket or update this one if you receive another crash in the future.
Customer support service by UserEcho