It doesn't happen very often, but every now and then this test crashes. Unfortunately there's no backtrace available. The only clue is this line in stderr:
STDERR: Memory pressure relief: Total: res = 4584259584/4441022464/-143237120, res+swap = 4581552128/4438454272/-143097856
I wonder if the crash is related to running out of memory or a problem inside the MemoryPressureHandler.
It's still crashing, but I'm going to remove this expectation anyway because memory pressure killer is now disabled when running layout tests, so something else must be wrong, and we'll never figure out what without another attempt at getting a backtrace.
(In reply to Michael Catanzaro from comment #1)
> It's still crashing
(Not usually, but often enough. A future gardener will need to check for a new backtrace when it happens.)