GWT 2.7 gwt.compile.args leads to "Unknown argument:" error

[confile]

I use the following configuration: 

build ":extended-dependency-manager:0.5.5"

compile ":gwt:1.0", {

transitive=false

}

gwt.compile.args = {

arg(value: '-strict')

arg(value: "-XjsInteropMode JS")

}

gwt {

version="2.7.0-beta1"

gin.version = '2.1.2' 

}

But when I do grails dev war I get the following error:

Unknown argument: -XjsInteropMode JS

  | Google Web Toolkit 2.7.0-beta1

When I use -XjsInteropMode JS as compiler parameter in a standalone GWT 2.7 project it works fine.

How can I make it working with gwt.compile.args?

[confile]

It works this way: 

arg(value: '-XjsInteropMode')
arg(value: 'JS')

[Nathan Dunn]

Is this with grails 2.4?  I have to explicitly include resources or comment it out in the plugin.  Either way I get the following error:

gwt.compile.args = {

arg(value: '-strict')

arg(value: "-XjsInteropMode")

        arg(value: "JS")

}

gwt {

version="2.7.0"

gin.version = '2.1.2' 

}

depencencies{

...

compile 'asm:asm:3.1'

...

}

plugins{

... 

  runtime ":resources:1.2.13"

  build ":extended-dependency-manager:0.5.5"

  compile ":gwt:1.0" , {
     transitive=false
  }

... 

}

 | Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.MethodVisitor
  | 	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
  | 	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
  | 	at java.security.AccessController.doPrivileged(Native Method)
  | 	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
  | 	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
  | 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
  | 	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
  | 	... 63 more