QProcess::waitForFinished broken on MIPS

#include <QtCore/QCoreApplication>
#include <QtCore/QDateTime>
#include <QtCore/QDebug>
#include <QtCore/QProcess>

#define MESSAGE_WITH_TIME qDebug() << (QDateTime::currentMSecsSinceEpoch() - startTime)

int main(int argc, char **argv) {
    QCoreApplication a(argc, argv);
    qint64 startTime = QDateTime::currentMSecsSinceEpoch();

    QProcess p;
    p.start("/bin/true");
    MESSAGE_WITH_TIME << "Calling waitForStarted()";
    bool wfs = p.waitForStarted();
    MESSAGE_WITH_TIME << "waitForStarted() returned" << wfs;
    MESSAGE_WITH_TIME << "Calling waitForFinished()";
    bool wff = p.waitForFinished();
    MESSAGE_WITH_TIME << "waitForFinished() returned" << wff;
    MESSAGE_WITH_TIME << "errorString() is" << p.errorString();
    return 0;
}

3 Calling waitForStarted()
21 waitForStarted() returned true
22 Calling waitForFinished()
30052 waitForFinished() returned false
30052 errorString() is "Process operation timed out"
QProcess: Destroyed while process ("/bin/true") is still running.

clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x74eccc48) = 4891
Process 4891 attached
[pid  4890] write(2, "29 waitForStarted() returned tru"..., 34) = 34
[pid  4890] write(2, "30 Calling waitForFinished()\n", 29) = 29
[pid  4891] exit_group(0)               = ?
[pid  4891] +++ exited with 0 +++
<... pselect6 resumed> )                = ? ERESTARTNOHAND (To be restarted if no handler)
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4891, si_uid=3286, si_status=0, si_utime=0, si_stime=0} ---
waitid(P_ALL, 0, {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4891, si_uid=3286, si_status=0, si_utime=0, si_stime=0}, WNOHANG|WEXITED|WNOWAIT, NULL) = 0
waitid(P_PID, 1, 0x7fae18c4, WNOHANG|WEXITED, NULL) = -1 ECHILD (No child processes)
waitid(P_ALL, 0, {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=4891, si_uid=3286, si_status=0, si_utime=0, si_stime=0}, WNOHANG|WEXITED|WNOWAIT, NULL) = 0