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    SubjectRe: [PATCH 1/3] signals: sigqueue_free: don't free sigqueue if it is queued
    > So. Let's suppose that (say) SIGHUP is pending, and the posix timer
    > sends SIGHUP too. In that case the new SIGHUP is added, and if the
    > previous one was infoless the new one "hides" it: collect_signal()
    > won't see 2 distinct signals, it will find only 1 signal and clear
    > the bit in sigpending->signal.

    That is correct behavior. Signals < SIGRTMIN do not queue. (POSIX says
    it's implementation-defined whether they do, and in Linux they don't.)
    When a signal does not queue, it's unspecified whether the the one that
    is ever actually seen is the first one or the last one (or any in between),
    so the siginfo_t details showing the second one in your example is fine.


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