[CentOS] wait() fails

[Michael Ubell]

>
> not known as far as I can tell. Is there a test script that can  
> reproduce this issue ? is this on a specific Arch ?

This is intel x86_64.  This is part of a larger program,
I have not tried to minimize the the test case.
I did notice that the child process has definitely
gone zombie at the time it hits the breakpoint
after the wait() fails.

I will submit a bug.