Support safe_pass_by_ref

Fixes #22
5 jobs for 5.7.2 in 1 minute and 45 seconds (queued for 1 minute and 37 seconds)
latest
Status Job ID Name Coverage
  Typecheck
failed #875
docker
hack

00:01:41

failed #874
docker
hack-min

00:01:40

 
  Test
skipped #877
docker
phpunit
skipped #876
docker
phpunit-min
 
  Deploy
skipped #878
docker
packagist
 
Name Stage Failure
failed
hack-min Typecheck There is an unknown failure, please try again
[2018-01-09 19:17:34] Naming: 0.079149
[2018-01-09 19:17:35] Heap size: 2786240
[2018-01-09 19:17:35] Type-check: 0.279422
[2018-01-09 19:17:35] Updating 1307 search files:: 0.255891
[2018-01-09 19:17:35] Dependency table load factor: 0 / 131072 (0.00)
[2018-01-09 19:17:35] Hashtable load factor: 21381 / 262144 (0.08) with 21381 nonempty slots
[2018-01-09 19:17:35] Waiting for daemon(s) to be ready...
Fatal error: exception End_of_file
ERROR: Job failed: exit code 1
failed
hack Typecheck There is an unknown failure, please try again
[2018-01-09 19:17:40] Naming: 0.029768
[2018-01-09 19:17:41] Heap size: 2786240
[2018-01-09 19:17:41] Type-check: 0.256853
[2018-01-09 19:17:41] Updating 1307 search files:: 0.118517
[2018-01-09 19:17:41] Dependency table load factor: 0 / 131072 (0.00)
[2018-01-09 19:17:41] Hashtable load factor: 21381 / 262144 (0.08) with 21381 nonempty slots
[2018-01-09 19:17:41] Waiting for daemon(s) to be ready...
Fatal error: exception End_of_file
ERROR: Job failed: exit code 1