The test com/sun/jdi/BreakpointOnClassPrepare.java has 3 modes. When the breakpoint is reached the suspend policy can be SUSPEND_ALL, SUSPEND_EVENT_THREAD, or SUSPEND_NONE.
It seems that while the breakpoint event is being handled, the breakpoint thread continues to run and can exit.
To make this test less noisy, should we disable the SUSPEND_NONE mode for now.