ASTTransformationVisitor not closing URL streams

I'm using Groovy as a script language in EJB in Glassfish 3.1
After using GroovyShell, when i'm shutting down the server i'm getting a lot of 'open stream' errors.
I've tested this bug with Groovy 1.8.5, 1.9 and 2 beta 2 - still the same

There's a line in ASTTransformationVisitor.java - line 202 in 2.0 beta 2
BufferedReader svcIn = new BufferedReader(new InputStreamReader(service.openStream()));

Looks like that stream is never closed ?

Below stack trace:

WARNING: Input stream has been finalized or forced closed without being explicitly closed; stream instantiation reported in following stack trace
java.lang.Throwable
at com.sun.enterprise.loader.ASURLClassLoader$SentinelInputStream.<init>(ASURLClassLoader.java:1230)
at com.sun.enterprise.loader.ASURLClassLoader$InternalJarURLConnection.getInputStream(ASURLClassLoader.java:1338)
at java.net.URL.openStream(URL.java:1010)
at org.codehaus.groovy.transform.ASTTransformationVisitor.doAddGlobalTransforms(ASTTransformationVisitor.java:202)
at org.codehaus.groovy.transform.ASTTransformationVisitor.addGlobalTransforms(ASTTransformationVisitor.java:190)
at org.codehaus.groovy.transform.ASTTransformationVisitor.addPhaseOperations(ASTTransformationVisitor.java:154)
at org.codehaus.groovy.control.CompilationUnit.<init>(CompilationUnit.java:187)
at org.codehaus.groovy.control.CompilationUnit.<init>(CompilationUnit.java:118)
at groovy.lang.GroovyClassLoader.createCompilationUnit(GroovyClassLoader.java:436)
at groovy.lang.GroovyClassLoader.doParseClass(GroovyClassLoader.java:271)
at groovy.lang.GroovyClassLoader.parseClass(GroovyClassLoader.java:264)
at groovy.lang.GroovyShell.parseClass(GroovyShell.java:638)
at groovy.lang.GroovyShell.parse(GroovyShell.java:650)
at groovy.lang.GroovyShell.parse(GroovyShell.java:677)
at groovy.lang.GroovyShell.parse(GroovyShell.java:668)