Imported From: https://issues.scala-lang.org/browse/SI-5019?orig=1
Reporter: Chris Seaton (chrisseaton)
Affected Versions: 2.9.1, 2.9.2
See #4907

@paulp said:
If you have witnessed it attempting to treat the -J argument like a class to run then you had better give me a transcript, because that's not what happens. And if you read the source to the runner you will see why it passes it.

Chris Seaton (chrisseaton) said (edited on Sep 21, 2011 11:18:44 PM UTC):
Using HelloWorld.scala from http://www.scala-lang.org/node/166.

$scala HelloWorld
Hello, world!

$scala -J-Xmx256M HelloWorld
java.lang.ClassNotFoundException 
 - klass: 'java/lang/ClassNotFoundException'

$scala HelloWorld -J-Xmx256M
java.lang.ClassNotFoundException 
 - klass: 'java/lang/ClassNotFoundException'

I presume that the ClassNotFoundException is -J-Xmx256M, but actually I may be mistaken about that.

I am using JAVA_OPTS as a workaround.

Edit: I meant HelloWorld, not Test in command lines above.

Chris Seaton (chrisseaton) said:
As an aside, looking at scala -help I can see that the format is

scala <options> [<script|class|object|jar> <arguments>]

However, if I run

scala HelloWorld -J-help

Then the scala script is treating -J-help as an option, when according to the usage grammar, it should be treating it as an argument and shouldn't be doing anything with it apart from passing it to main, so there is definitely something not right with the script.

@paulp said:

% cat a.scala
object HelloWorld {
  def main(args: Array[String]) {
    println("Hello, world!")
  }
}
% scalac291 a.scala 
% scala291 -J-Xmx256M HelloWorld
Hello, world!

You'll have to supply evidence it's not something in your environment.

There is a bug, which is that "scala HelloWorld -J-help" should be passing -J-help to HelloWorld rather than grabbing it for the JVM.

Viacheslav Blinov (dant3) said:
Can't reproduce with scala 2.11.4 on Mac OS X 10.10, and according to #4907 and scala/scala#2767 it looks like it was already fixed.