FULL PRODUCT VERSION :
Java(TM) SE Runtime Environment (build 9-ea+143)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+143, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
OS X El Capitan 10.11.6

A DESCRIPTION OF THE PROBLEM :
IntelliJ IDEA 2016.2.5
Build #IU-162.2228.15, built on October 14, 2016

I try to compile Java 9 project and get error:

Error:java: invalid flag: -release

but "javac -help" gives me :

 --release <release> ,

so it has two hyphens, but intellij idea calls it with one



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
difference between --release and -release

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
--release
ACTUAL -
-release

REPRODUCIBILITY :
This bug can be reproduced always.