Category and memory leak

[jeremie.bre...@gmail.com]

Hello,

I noticed a strange behavior with my use of Groovy categories. If I execute the 
unit test [1], the jvm heap and permgen space size don't change, but the memory 
used by the java process keep growing. After several hours, this process take 
more than 1g.

I haven't seen any discussion or issues on this subject, and it's maybe not 
"the good way" to use category. In my real usecase, I want to execute an 
external callback (defined in groovy with a closure), and this callback is 
executed with a category in order to help with some complex classes.

This test is executed in Windows 7, with a JRE 1.7.0_80, but this issue is 
reproduced too in production on Linux, with openjdk 1.7.0_91.

Thanks !

[1]
public class TestCat {

  public static class A {
  }

  @Test
  public void testCategory() {
    for(;;) {
      GroovyCategorySupport.use(A.class, new Closure<Object>(null) {
        public Object call() {
          return null;
        }
      });
    }
  }
}