I've got some unit test code that forks off test processes using the 'system' function and then delays using 'threadDelay' to synchronize with the test process.

This has worked fine until I upgraded to 6.4.2, now some of the 'threadDelay' calls never return - it's like they are stuck in limbo.

Any ideas? What would have changed between 6.4 and 6.4.2 that would cause this behavior?

Thanks,
Rich

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