instantiating a class withTraits does not use the classloader of the trait

package groovy.lang.traits

import org.codehaus.groovy.control.CompilerConfiguration;

class GroovyTraitsClassloaderTest {

	static class ClassA {
		
	}
	
	static trait TraitA {
		
		def aMethod() {
			println "traitA method"
		}
		
	}
	
	static main(args) {
	
		
		def aWithA = new ClassA().withTraits(TraitA)
		
		aWithA.aMethod()
		
		
		GroovyClassLoader gcl = new GroovyClassLoader(Thread.currentThread().getContextClassLoader());
		
		Class classB = gcl.parseClass("""\
class ClassB {}
""")
		
		Class traitB = gcl.parseClass("""\
trait TraitB {
	
	def bMethod() {
		println "traitB method"
	}
	
}
""")
		
		//ok
		def bWithA = classB.newInstance().withTraits(TraitA)

		//ok
		def bWithB = classB.newInstance().withTraits(traitB)
		bWithB.bMethod()
		
		//fails
		def aWithB = new ClassA().withTraits(traitB)
		
		aWithB.bMethod()
		
		
	}

}