I tried it, and got:
sas@ubuntu:~/devel/apps/playdoces/documentation/1.2.4/manual/tmp$ ./status.scala error: script file does not close its header with !# or ::!# one error found
sas@ubuntu:~/devel/apps/playdoces/documentation/1.2.4/manual/tmp$ ./status.scala error: script file does not close its header with !# or ::!# one error found
#!/usr/bin/env scala
!#
it appears to work.