Workers with error events doesn't work

[LRagji]

I simply wanted to hook up to error event on my instance reqError it looks like they donot work when workers are involved.., am i missing something or it this broken?
While i could debug and see that worker tries to emit the correct event but its on a completely new EE instance, this error needs to be pushed through post message?

[mcollina]

Yes, I think so.
Would you like to send a Pull Request to address this issue? Remember to add unit tests.