RFR 8157528: jdk/jshell/ExecutionControlTest.java failed intermittently with NPE

[Jan Lahoda]

Seems OK.

(I take this is used for tests - it would probably be more reliable to 
repeat the joining until activeCount is 0, but no need to do that for 
this impl.)

Jan

On 23.5.2016 21:53, Robert Field wrote:
> Bug:   https://bugs.openjdk.java.net/browse/JDK-8157528
>
>
>                   snippetThread.start();
>                   Thread[] threadList = new
> Thread[execThreadGroup.activeCount()];
>                   execThreadGroup.enumerate(threadList);
>                   for (Thread thread : threadList) {
> +                    if (thread != null)
>                       thread.join();
>                   }
>
>                   if (stopped.get()) {
>                       debug("Killed.");
>