Circuit AI crash

[GoogleFrog]

Here is a log. ZeroK-RTS/CrashReports#109210

Apparently it comes alongside stutters and high memory use.

Apparently the person with the bug can reliably reproduce it about 10-15 minutes into this mission:

Here is a script that runs the mission:
_script.txt

[rlcevg]

There's issue with plates in old AI version. So transition to latest version is taking place (related #134).
Will close this on successful transition.