Error message in inloop should print stacktrace of error origin?

[DrChainsaw]

In case the error happens deep down in some generic function it will be easier to track down if catch_backtrace is used, for example like this:

@error "Exception while executing task on worker $(Threads.threadid()). Shutting down WorkerPool." e =
                e stacktrace = stacktrace(catch_backtrace()) args = args