The OPtr is just a wrapper for a MapObject. I use OPtr<PortDock> rather than PortDock* to avoid segfaults when the portdock is destroyed. The == comparison compares serials, so it´s 100% safe to use. I found a potential cause for this assert in the way superfluous or invalid destinations are discarded, please check whether you can still reproduce it now… -- https://code.launchpad.net/~widelands-dev/widelands/new-shipping/+merge/371155 Your team Widelands Developers is subscribed to branch lp:~widelands-dev/widelands/new-shipping.
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