bqskit-server crashing in detached mode after client disconnects

[alonkukl]

I get the following crash:

ERROR | base: Traceback (most recent call last):
File "..../bqskit/runtime/base.py", line 465, in run
self.handle_message(msg, direction, conn, payload)
File "...//bqskit/runtime/detached.py", line 139, in handle_message
self.handle_disconnect(conn)
File ".../bqskit-1/bqskit/runtime/detached.py", line 265, in handle_disconnect
tasks_to_pop.append((task_id, tid))
UnboundLocalError: local variable 'task_id' referenced before assignment

Whenever a client disconnects from the server:

from bqskit import Circuit
from bqskit.compiler import Compiler
from bqskit.passes import UnfoldPass

passes = [UnfoldPass()]
circuit = Circuit(3)

with Compiler('localhost') as comp:
    out_circ  = comp.compile(circuit, passes)

[alonkukl]

Solved by #294