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[poy <1681153@xxxxxxxxxxxxxxxxxx>]

this is a limitation in the Rich Edit control we use to display chat
messages.

rev 62243417be3658a8aeaf25d6b6a6a0432df2b4bf adds a little test one can
easily tweak to reproduce.

the most straight-forward resolution is to cut these messages when it is
known they are hitting on Rich Edit limits.

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https://bugs.launchpad.net/bugs/1681153

Title:
  Sending a lot of empty lines to main chat makes DC++ to hang

Status in DC++:
  Confirmed

Bug description:
  If i send 15000 empty lines into main chat from another client, DC++
  will hang (sometimes i need to do it twice). When i then restart DC++
  i can see a message '65766: Buffer overflow' from the chat history. So
  if the hubsoft have no line limit you can hang a lot of DC++ clients
  in the hub.

  I'm running DC++ 0.865.

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