Leaving and re-entering a world crashes

[IntegratedQuantum]

Segmentation fault at address 0x78f4a0835000
/home/mint/Cubyz/src/items.zig:1169:7: 0x157b985 in clear (Cubyzig)
  self.item = null;
      ^
/home/mint/Cubyz/src/Inventory.zig:1815:14: 0x1571b5d in loadFromZon (Cubyzig)
  stack.clear();
             ^
/home/mint/Cubyz/src/game.zig:438:24: 0x14ca86e in loadFrom (Cubyzig)
  inventory.loadFromZon(zon.getChild("inventory"));
                       ^
/home/mint/Cubyz/src/game.zig:643:18: 0x14ca5d7 in finishHandshake (Cubyzig)
  Player.loadFrom(zon.getChild("player"));
                 ^
/home/mint/Cubyz/src/network.zig:694:47: 0x144886b in receive (Cubyzig)
      try conn.manager.world.?.finishHandshake(zon);
                                              ^
/home/mint/Cubyz/src/network.zig:1672:14: 0x1796115 in collectPackets (Cubyzig)
     try prot(self, data);
             ^
/home/mint/Cubyz/src/network.zig:1724:27: 0x1796cc7 in flawedReceive (Cubyzig)
   try self.collectPackets();
                          ^
/home/mint/Cubyz/src/network.zig:1681:21: 0x1734b53 in receive (Cubyzig)
  self.flawedReceive(data) catch |err| {
                    ^
/home/mint/Cubyz/src/network.zig:531:18: 0x16bed98 in onReceive (Cubyzig)
     conn.receive(data);
                 ^
/home/mint/Cubyz/src/network.zig:562:19: 0x1635bdd in run (Cubyzig)
    self.onReceive(data, source);
                  ^
/home/mint/Cubyz/compiler/zig/lib/std/Thread.zig:409:13: 0x158f29a in callFn__anon_39456 (Cubyzig)
            @call(.auto, f, args);
            ^
/home/mint/Cubyz/compiler/zig/lib/std/Thread.zig:678:30: 0x14e1412 in entryFn (Cubyzig)
                return callFn(f, args_ptr.*);
                             ^