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For some reason, neither of the compilers I usually use noticed the uninitialized-variable problem I introduced in commit 7e2a18a9161fee7e. That's hardly a good enough excuse though. Committing with brown paper bag on head. In addition to putting the operations in the right order, move the declaration of "now" inside the loop; there's no need for it to be outside, and that does wake up older gcc enough to notice any similar future problem. Back-patch to 9.4; earlier versions lack the time-to-SIGKILL stanza so there's no bug.