grammar my.mavenized.HeroLanguage with org.eclipse.xtext.xbase.Xbase
..
Heros:
	'package' name = QualifiedName
	heros+=SuperHero*;
..	
;

package my.mavenized.herolanguage.tests
..
@RunWith(XtextRunner)
@InjectWith(HeroLanguageInjectorProvider)
class SimpleParsingTest {
	
	@Inject extension ParseHelper<Heros>
	
	@Test def void testParse() {
		val heros = '''
		    package com.siemens.cp.chpmhs.emu.queues.t1.t2.t3.t4.tr.tr.tr.tr.tr.tr.tr.tr.tr.tr
		    
			hero superman can FLY
			hero iceman can ICE
		'''.parse
		assertEquals(2, heros.heros.size)
	}
}

package com.siemens.cp.chpmhs.emu.queues.t1.t2.t3.t4.tr.tr.tr.tr.tr.tr.tr.tr.tr.tr
hero Superman can FLY {
	println("Hello I can fly!")
}

[ERROR] Failed to execute goal org.eclipse.xtext:xtext-maven-plugin:2.5.0:generate (default) on project example-project: Execution default of goal org.eclipse.xtext:xtext-maven-plugin:2.5.0:generate failed: 23 -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.eclipse.xtext:xtext-maven-plugin:2.5.0:generate (default) on project example-project: Execution default of goal org.eclipse.xtext:xtext-maven-plugin:2.5.0:generate failed: 23
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal org.eclipse.xtext:xtext-maven-plugin:2.5.0:generate failed: 23
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
	... 19 more
Caused by: java.lang.ArrayIndexOutOfBoundsException: 23
	at org.eclipse.emf.common.util.URI$URIPool$FileAccessUnit.reset(URI.java:1583)
	at org.eclipse.emf.common.util.Pool.doIntern(Pool.java:963)