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patch for issue 456
Do not filter out duplicate subscriptions on the XSUB side of XSUB/XPUB, so that ZMQ_XPUB_VERBOSE doesn't get blocked by forwarding devices (as long as the devices all use ZMQ_XPUB_VERBOSE)
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@ -95,7 +95,13 @@ int zmq::xsub_t::xsend (msg_t *msg_, int flags_)
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// Process the subscription.
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if (*data == 1) {
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if (subscriptions.add (data + 1, size - 1))
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// this used to filter out duplicate subscriptions,
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// however this is alread done on the XPUB side and
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// doing it here as well breaks ZMQ_XPUB_VERBOSE
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// when there are forwarding devices involved
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//
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//if (subscriptions.add (data + 1, size - 1))
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subscriptions.add (data + 1, size - 1);
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return dist.send_to_all (msg_, flags_);
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}
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else {
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