<html>
 <body>
  <div style="font-family: Verdana, Arial, Helvetica, Sans-Serif;">
   <table bgcolor="#f9f3c9" width="100%" cellpadding="8" style="border: 1px #c9c399 solid;">
    <tr>
     <td>
      This is an automatically generated e-mail. To reply, visit:
      <a href="http://svn.reviewboard.kde.org/r/7045/">http://svn.reviewboard.kde.org/r/7045/</a>
     </td>
    </tr>
   </table>
   <br />





<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
 <p style="margin-top: 0;">On October 10th, 2012, 8:45 p.m., <b>Gael de Chalendar</b> wrote:</p>
 <blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
  <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">This time, I was not able to reproduce the problem but I know it and I was not able to find a solution for years. Your analysis and your patch seem soon. It tested the patch version with no problem. I'll apply it soon.</pre>
 </blockquote>







</blockquote>

<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Nemanja, if you have write access, feel free to commit it yourself. I'll maybe not have time before a few days.</pre>
<br />








<p>- Gael</p>


<br />
<p>On September 23rd, 2012, 11:03 p.m., Nemanja Hirsl wrote:</p>






<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" style="background-image: url('http://svn.reviewboard.kde.org/media/rb/images/review_request_box_top_bg.png'); background-position: left top; background-repeat: repeat-x; border: 1px black solid;">
 <tr>
  <td>

<div>Review request for KDE Games.</div>
<div>By Nemanja Hirsl.</div>


<p style="color: grey;"><i>Updated Sept. 23, 2012, 11:03 p.m.</i></p>






<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
 <table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
 <tr>
  <td>
   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Code analysis:
 - PlayerList is list of KPlayer*; 
 - Iterators became messed up in qDeleteAll (still crashing); 
 - pulled out deletion from qDeleteAll to my own loop (still crashing);  
 - KPlayer destructor analyzed - When object is deleted, it get pulled out from the game (playerList), modifying original playerList. This is the problem because iterators to a QList became invalid after any (insertion or) removal!

In KPlayer::~KPlayer() see  game()->playerDeleted(this); 
In  KGame::playerDeleted(KPlayer *player) see systemRemovePlayer(player,false); 
in KGame::systemRemovePlayer(KPlayer* player,bool deleteit) see  systemRemove(player,deleteit); 
Finally result = d->mPlayerList.removeAll(p);

I've created simple example to demonstrate what exactly is happening in the 
code. Take a look at http://pastebin.com/KcyfenQc for details about example. 
Useful link is also http://stackoverflow.com/questions/8657244/does-qts-qlist-
save-iterators-after-containers-modifications
</pre>
  </td>
 </tr>
</table>


<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
 <tr>
  <td>
   <pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Tests performed:
1.  New local game with 5 players (1 human - Baudouin, 4 AI)
1.1 During AI turn start a new game.
1.2 In original code crash happens. Debug traces:
    ksirk(24791) Ksirk::KGameWindow::actionNewGame: valid
    ksirk(24791)/libkdegames (KGame) KGame::setGameStatus: : GAMESTATUS CHANGED  to 3
    ksirk(24791) Ksirk::GameLogic::GameAutomaton::slotPropertyChanged: 6  (skin is  28672 )
    ksirk(24791) Ksirk::GameLogic::GameAutomaton::slotPropertyChanged: END GameAutomaton::slotPropertyChanged  6  (skin is  28672 )
    ksirk(24791) Ksirk::GameLogic::GameAutomaton::removeAllPlayers:
    ksirk(24791)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x3224b90) , id= 1025
    ksirk(24791)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x3225a00)
    ksirk(24791)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x3225a00) delete= false
    ksirk(24791)/libkdegames (KGame) KGame::playerDeleted: : id ( 1025 ) to be removed KPlayer(0x3224b90)
    ksirk(24791)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24791)/libkdegames (KGame) KGame::systemRemove: : Player ( 1025 ) to be removed KPlayer(0x3224b90)
    ksirk(24791)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1025
    ksirk(24791)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24791) Ksirk::GameLogic::AIPlayer::~AIPlayer: "Victor Emmanuel"
    ksirk(24791)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x3227e10) , id= 1027
    ksirk(24791)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x3ca81b0)
    ksirk(24791)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x3ca81b0) delete= false
    ksirk(24791)/libkdegames (KGame) KGame::playerDeleted: : id ( 1027 ) to be removed KPlayer(0x3227e10)
    ksirk(24791)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24791)/libkdegames (KGame) KGame::systemRemove: : Player ( 1027 ) to be removed KPlayer(0x3227e10)
    ksirk(24791)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1027
    ksirk(24791)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24791) Ksirk::GameLogic::AIPlayer::~AIPlayer: "Elisabeth"
    ksirk(24791)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x3179e30) , id= 1029
    ksirk(24791)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x317b6f0)
    ksirk(24791)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x317b6f0) delete= false
    ksirk(24791)/libkdegames (KGame) KGame::playerDeleted: : id ( 1029 ) to be removed KPlayer(0x3179e30)
    ksirk(24791)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24791)/libkdegames (KGame) KGame::systemRemove: : Player ( 1029 ) to be removed KPlayer(0x3179e30)
    ksirk(24791)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1029
    ksirk(24791)/libkdegames (KGame) KPlayer::~KPlayer: done
    KCrash: Application 'ksirk' crashing...

    Notice how order of AI Players is messed up. Order of players is shown below where first name (human - Baudouin was not printed)
1.3 After applying this patch debug crash is prevented and debug traces are:
    ksirk(24998) Ksirk::KGameWindow::actionNewGame: valid
    ksirk(24998)/libkdegames (KGame) KGame::setGameStatus: : GAMESTATUS CHANGED  to 3
    ksirk(24998) Ksirk::GameLogic::GameAutomaton::slotPropertyChanged: 6  (skin is  28672 )
    ksirk(24998) Ksirk::GameLogic::GameAutomaton::slotPropertyChanged: END GameAutomaton::slotPropertyChanged  6  (skin is  28672 )
    ksirk(24998) Ksirk::GameLogic::GameAutomaton::removeAllPlayers:
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x2bfa110) , id= 1030
    ksirk(24998)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0xa1c8f0)
    ksirk(24998)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0xa1c8f0) delete= false
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : id ( 1030 ) to be removed KPlayer(0x2bfa110)
    ksirk(24998)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24998)/libkdegames (KGame) KGame::systemRemove: : Player ( 1030 ) to be removed KPlayer(0x2bfa110)
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1030
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24998) Ksirk::GameLogic::AIPlayer::~AIPlayer: "de Gaulle"
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x29ffd10) , id= 1031
    ksirk(24998)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x2bf3b30)
    ksirk(24998)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x2bf3b30) delete= false
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : id ( 1031 ) to be removed KPlayer(0x29ffd10)
    ksirk(24998)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24998)/libkdegames (KGame) KGame::systemRemove: : Player ( 1031 ) to be removed KPlayer(0x29ffd10)
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1031
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24998) Ksirk::GameLogic::AIPlayer::~AIPlayer: "Victor Emmanuel"
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x42c4020) , id= 1032
    ksirk(24998)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x35811d0)
    ksirk(24998)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x35811d0) delete= false
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : id ( 1032 ) to be removed KPlayer(0x42c4020)
    ksirk(24998)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24998)/libkdegames (KGame) KGame::systemRemove: : Player ( 1032 ) to be removed KPlayer(0x42c4020)
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1032
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24998) Ksirk::GameLogic::AIPlayer::~AIPlayer: "Akihito"
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x357c400) , id= 1033
    ksirk(24998)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x3b16240)
    ksirk(24998)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x3b16240) delete= false
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : id ( 1033 ) to be removed KPlayer(0x357c400)
    ksirk(24998)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24998)/libkdegames (KGame) KGame::systemRemove: : Player ( 1033 ) to be removed KPlayer(0x357c400)
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1033
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24998) Ksirk::GameLogic::AIPlayer::~AIPlayer: "Elisabeth"
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: : this= KPlayer(0x2a730f0) , id= 1034
    ksirk(24998)/libkdegames (KGame) KGameIO::~KGameIO: : this= KGameIO(0x2a27fd0)
    ksirk(24998)/libkdegames (KGame) KPlayer::removeGameIO: : KGameIO(0x2a27fd0) delete= false
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : id ( 1034 ) to be removed KPlayer(0x2a730f0)
    ksirk(24998)/libkdegames (KGame) KGame::systemRemovePlayer:
    ksirk(24998)/libkdegames (KGame) KGame::systemRemove: : Player ( 1034 ) to be removed KPlayer(0x2a730f0)
    ksirk(24998)/libkdegames (KGame) KGame::playerDeleted: : sending IdRemovePlayer  1034
    ksirk(24998)/libkdegames (KGame) KPlayer::~KPlayer: done
    ksirk(24998) Ksirk::GameLogic::GameAutomaton::state: new state (id= 0 ) is  INIT
    
    Notice the correct order of all Players; all players removed correctly.


2.  New standard TCP/IP game with patch applied
2.1 No issues noticed.</pre>
  </td>
 </tr>
</table>




<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">

 <li>/trunk/KDE/kdegames/ksirk/ksirk/GameLogic/gameautomaton.cpp <span style="color: grey">(1309567)</span></li>

</ul>

<p><a href="http://svn.reviewboard.kde.org/r/7045/diff/" style="margin-left: 3em;">View Diff</a></p>




  </td>
 </tr>
</table>








  </div>
 </body>
</html>