[REDO] MemberNameTable doesn't purge stale entries

FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
Calling findSpecial is leaking memory.

THE PROBLEM WAS REPRODUCIBLE WITH -Xint FLAG: Did not try

THE PROBLEM WAS REPRODUCIBLE WITH -server FLAG: Yes

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
import java.lang.invoke.*;

public class Leak {
  public void callMe() {
  }
  
  public static void main(String[] args) throws Throwable {
    Leak leak = new Leak();
    
    while(true) {
      MethodHandles.Lookup lookup = MethodHandles.lookup();
      MethodType mt = MethodType.fromMethodDescriptorString("()V", Leak.class.getClassLoader());
      // findSpecial leaks some native mem
      MethodHandle mh = lookup.findSpecial(Leak.class, "callMe", mt, Leak.class);
      mh.invokeExact(leak);
    }
  }
}

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected: No increase in memory
Result: Increase in memory
REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.lang.invoke.*;

public class Leak {
  public void callMe() {
  }
  
  public static void main(String[] args) throws Throwable {
    Leak leak = new Leak();
    
    while(true) {
      MethodHandles.Lookup lookup = MethodHandles.lookup();
      MethodType mt = MethodType.fromMethodDescriptorString("()V", Leak.class.getClassLoader());
      // findSpecial leaks some native mem
      MethodHandle mh = lookup.findSpecial(Leak.class, "callMe", mt, Leak.class);
      mh.invokeExact(leak);
    }
  }
}
---------- END SOURCE ----------