Out of memory errors are not reported

[adriandmitroca]

Hey,

I noticed that OOM errors are not sent to Rollbar anymore:

PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 20480 bytes) 

I'm pretty sure it worked in the past.

[linear]

SDK-568

[danielmorell]

This is a really tricky one to report. The Rollbar package needs enough available memory left to send the report. I don't believe we do anything special with OOM errros. So these reports are likely intermittent (depending on if Rollbar runs out of memory when sending).

With the addition of Telemetry in v4.1 of the core SDK we have increased our base payload size which also means Rollbar needs more memory.

I think our best option is to write a special OOM error handler that checks how much memory is left and if there is plenty provides a full stack trace in the report, otherwise it sends a report that uses as little memory as possible.