testapi appears to be failing on the Apple-Catalina-LLINT-CLoop-BuildAndTest bot.
It is a flaky failure technically. But it is a fairly consistent failure having failed more frequently than it passes. It also appears to have been in this state since it started running on this queue, starting at r280283:
I wouldn't classify this as a regression, being that it appears to have been problematic since it started running on that queue.
The following message appears 6 times during the failing testapi runs:
FAILED MultithreadedMultiVMExecutionTest: script eval
It's usually passing on MacPro6,1, and usually failing on Macmini8,1.
*** This bug has been marked as a duplicate of bug 235633 ***