printStackTrace throws NullPointerException

[aaronc]

In my console output I see the following stack trace:

WARNING: fiber Fiber@10000003[task: ParkableForkJoinTask@471b2af9(Fiber@10000003), target: co.paralleluniverse.pulsar.ClojureHelper$3@404ca753, scheduler: co.paralleluniverse.fibers.FiberForkJoinScheduler@60ea09a3] is hogging the CPU or blocking a thread.
No stack trace
FiberTimedScheduler terminated!
java.lang.NullPointerException
    at co.paralleluniverse.strands.Strand.printStackTrace(Strand.java:877)
    at co.paralleluniverse.fibers.FiberTimedScheduler.reportProblemFibers(FiberTimedScheduler.java:458)
    at co.paralleluniverse.fibers.FiberTimedScheduler.work(FiberTimedScheduler.java:140)
    at co.paralleluniverse.fibers.FiberTimedScheduler.access$000(FiberTimedScheduler.java:45)
    at co.paralleluniverse.fibers.FiberTimedScheduler$1.run(FiberTimedScheduler.java:81)
    at java.lang.Thread.run(Thread.java:745)

Looking at Strand.printStackTrace, I see that it's written as:

    public static void printStackTrace(StackTraceElement[] trace, java.io.PrintStream out) {
        if (trace == null)
            out.println("No stack trace");
        for (StackTraceElement traceElement : trace)
            out.println("\tat " + traceElement);
    }

There is a missing else before the for loop. Even when there is no stack trace, it is still trying to print one out.

[aaronc]

I've created a pull request to fix this: #69

I should mention that I consider this issue to be critical because it results in the FiberTimedScheduler being terminated which causes other fibers to be rejected (I get RejectedExecutionException's) later down the pipeline. This breaks my whole program.

[aaronc]

Any chance of getting 0.6.2-SNAPSHOT in sonatype snapshots with this commit?

[pron]

Done.

[aaronc]

Thanks!