make index file creation more robust in worker_runtime (cf. issue #208 and commits 766796c and bfcb768)
make index file creation more robust in worker_runtime (cf. issue #208 and commits 766796c and bfcb768)

ktkt2009/disco,oldmantaiter/disco,seabirdzh/disco,ErikDubbelboer/disco,seabirdzh/disco,pombredanne/disco,seabirdzh/disco,pavlobaron/disco_playground,pooya/disco,pombredanne/disco,pooya/disco,scrapinghub/disco,beni55/disco,pavlobaron/disco_playground,beni55/disco,ktkt2009/disco,oldmantaiter/disco,ktkt2009/disco,oldmantaiter/disco,discoproject/disco,mwilliams3/disco,pombredanne/disco,ktkt2009/disco,mwilliams3/disco,beni55/disco,mozilla/disco,beni55/disco,pooya/disco,beni55/disco,pombredanne/disco,discoproject/disco,oldmantaiter/disco,scrapinghub/disco,mwilliams3/disco,simudream/disco,discoproject/disco,pooya/disco,ErikDubbelboer/disco,simudream/disco,oldmantaiter/disco,pavlobaron/disco_playground,simudream/disco,scrapinghub/disco,mwilliams3/disco,discoproject/disco,simudream/disco,scrapinghub/disco,mozilla/disco,discoproject/disco,ErikDubbelboer/disco,mozilla/disco,pavlobaron/disco_playground,seabirdzh/disco,ktkt2009/disco,mozilla/disco,ErikDubbelboer/disco,mwilliams3/disco,simudream/disco,ErikDubbelboer/disco,seabirdzh/disco,pombredanne/disco