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[Bug-gnubg] Pixel problem causes program crash


From: Billie Patterson
Subject: [Bug-gnubg] Pixel problem causes program crash
Date: Fri, 31 Jan 2003 07:26:16 -0800 (PST)

Playing last night, I clicked on my dice to signal the end
of my move, and the DOS window opened with what appears to
be an infinite loop writing to a text file.  The error
message is:

(gnubg.exe:4294366597): Gdk-CRITICAL **: file
gdkimage-win32.c: line 235 (gdk_image_put_pixel): assertion
`image != NULL' failed 

I minimized the DOS window and kept playing, but after
another couple of moves, the menu, toolbar and top half of
the board disappeared, and I couldn't close the program
from either the main window or the DOS window -- had to end
the task with the Windows "Close Window" option.  The
exported game file is attached.

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gnubg (O, 13 pts) vs. Billie (X, 14 pts) (money game)

Game number 28

Match Information:

gnubg's rating: n/a
Billie's rating: n/a
Date: January 28, 2003
Event: n/a
Round: n/a
Place: n/a
Annotator: n/a
Comments: n/a
Move number 1: X to play 34

 GNU Backgammon  Position ID: 4HPwATDgc/ABMA
                 Match ID   : cIgRANAAcAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 | X           O    |   | O              X |     13 points
 | X           O    |   | O              X |     
 | X           O    |   | O                |     
 | X                |   | O                |     
 | X                |   | O                |    
v|                  |BAR|                  |     (Cube: 1)
 | O                |   | X                |    
 | O                |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X              O |     Rolled 34
 | O           X    |   | X              O |     14 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: Billie
Pip counts: O 167, X 167

* Billie moves 24/20 13/10

Cube analysis
0-ply cubeless equity  +0.074
  0.527 0.141 0.007 - 0.473 0.123 0.006
1. No double            +0.100
2. Double, pass         +1.000  ( +0.900)
3. Double, take         -0.174  ( -0.274)
Proper cube action: No double, beaver (23.3%)

Rolled 34 (-0.074):
*    1. Cubeful 0-ply    24/20 13/10                  Eq.:  +0.039
       0.508 0.137 0.007 - 0.492 0.126 0.004
     2. Cubeful 0-ply    24/21 13/9                   Eq.:  +0.037 ( -0.002)
       0.506 0.140 0.007 - 0.494 0.126 0.004
     3. Cubeful 0-ply    13/10 13/9                   Eq.:  +0.019 ( -0.020)
       0.501 0.150 0.009 - 0.499 0.137 0.008
     4. Cubeful 0-ply    24/21 24/20                  Eq.:  -0.001 ( -0.040)
       0.501 0.122 0.005 - 0.499 0.126 0.003
     5. Cubeful 0-ply    13/9 6/3                     Eq.:  -0.049 ( -0.088)
       0.488 0.139 0.008 - 0.512 0.150 0.009


Move number 2: O to play 61

 GNU Backgammon  Position ID: 4HPiASHgc/ABMA
                 Match ID   : MAEHANAAcAAA
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg
 | X           O    |   | O  X           X |     13 points
 | X           O    |   | O                |     Rolled 61
 | X           O    |   | O                |     
 | X                |   | O                |     
 |                  |   | O                |    
^|                  |BAR|                  |     (Cube: 1)
 | O                |   | X                |    
 | O                |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X              O |     
 | O     X     X    |   | X              O |     14 points
 +13-14-15-16-17-18------19-20-21-22-23-24-+     X: Billie
Pip counts: O 167, X 160

* gnubg moves 13/7 8/7

Rolled 61:*    13/7 8/7


Move number 3: X to play 56

 GNU Backgammon  Position ID: 4NvgATDgc+IBIQ
                 Match ID   : cIkaANAAcAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 | X           O  O |   | O  X           X |     13 points
 | X           O  O |   | O                |     
 | X                |   | O                |     
 | X                |   | O                |     
 |                  |   | O                |    
v|                  |BAR|                  |     (Cube: 1)
 |                  |   | X                |    
 | O                |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X              O |     Rolled 56
 | O     X     X    |   | X              O |     14 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: Billie
Pip counts: O 160, X 160

* Billie moves 20/9

Cube analysis
0-ply cubeless equity  +0.079
  0.527 0.135 0.006 - 0.473 0.112 0.004
1. No double            +0.106
2. Double, pass         +1.000  ( +0.894)
3. Double, take         -0.163  ( -0.269)
Proper cube action: No double, beaver (23.1%)

Rolled 56 (-0.148):
*    1. Cubeful 0-ply    20/9                         Eq.:  -0.000
       0.503 0.128 0.005 - 0.497 0.137 0.005
     2. Cubeful 0-ply    20/14 13/8                   Eq.:  -0.089 ( -0.088)
       0.483 0.121 0.005 - 0.517 0.154 0.006
     3. Cubeful 0-ply    20/15 10/4                   Eq.:  -0.174 ( -0.174)
       0.462 0.114 0.005 - 0.538 0.169 0.007
     4. Cubeful 0-ply    20/14 10/5                   Eq.:  -0.176 ( -0.175)
       0.461 0.112 0.005 - 0.539 0.167 0.007
     5. Cubeful 0-ply    13/8 10/4                    Eq.:  -0.208 ( -0.208)
       0.447 0.121 0.005 - 0.553 0.169 0.007


Move number 4: O to play 32

 GNU Backgammon  Position ID: 4HPFAyDg2+ABMA
                 Match ID   : MIEJANAAcAAA
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg
 | X           O  O |   | O              X |     13 points
 | X           O  O |   | O                |     Rolled 32
 | X                |   | O                |     
 | X                |   | O                |     
 |                  |   | O                |    
^|                  |BAR|                  |     (Cube: 1)
 |                  |   | X                |    
 | O                |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X              O |     
 | O     X  X  X    |   | X              O |     14 points
 +13-14-15-16-17-18------19-20-21-22-23-24-+     X: Billie
Pip counts: O 160, X 149

* gnubg moves 24/22 13/10

Rolled 32:*    24/22 13/10


Move number 5: X to play 62

 GNU Backgammon  Position ID: 4NvEASTgc8UDIA
                 Match ID   : cAkLANAAcAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 | X     O     O  O |   | O              X |     13 points
 | X           O  O |   | O                |     
 | X                |   | O                |     
 | X                |   | O                |     
 |                  |   | O                |    
v|                  |BAR|                  |     (Cube: 1)
 |                  |   | X                |    
 |                  |   | X                |     
 | O           X    |   | X                |     
 | O           X    |   | X                |     Rolled 62
 | O     X  X  X    |   | X        O     O |     14 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: Billie
Pip counts: O 155, X 149

* Billie moves 13/7 9/7

Cube analysis
0-ply cubeless equity  +0.132
  0.547 0.152 0.006 - 0.453 0.117 0.003
1. No double            +0.178
2. Double, pass         +1.000  ( +0.822)
3. Double, take         -0.043  ( -0.221)
Proper cube action: No double, beaver (21.2%)

Rolled 62 (-0.106):
     1. Cubeful 0-ply    10/4 6/4                     Eq.:  +0.100
       0.528 0.139 0.004 - 0.472 0.121 0.004
*    2. Cubeful 0-ply    13/7 9/7                     Eq.:  +0.094 ( -0.006)
       0.530 0.126 0.003 - 0.470 0.117 0.003
     3. Cubeful 0-ply    9/3*/1*                      Eq.:  +0.012 ( -0.087)
       0.498 0.149 0.004 - 0.502 0.134 0.004
     4. Cubeful 0-ply    24/22 9/3*                   Eq.:  -0.116 ( -0.215)
       0.474 0.123 0.004 - 0.526 0.159 0.006
     5. Cubeful 0-ply    10/8 9/3*                    Eq.:  -0.133 ( -0.233)
       0.466 0.117 0.004 - 0.534 0.147 0.005


Move number 6: O to play 54

 GNU Backgammon  Position ID: 4NuJAyDg28QBJA
                 Match ID   : MIESANAAcAAA
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg
 | X     O     O  O |   | O              X |     13 points
 | X           O  O |   | O                |     Rolled 54
 | X                |   | O                |     
 |                  |   | O                |     
 |                  |   | O                |    
^|                  |BAR|                  |     (Cube: 1)
 |                  |   | X                |    
 |                  |   | X                |     
 | O           X    |   | X                |     
 | O           X  X |   | X                |     
 | O     X     X  X |   | X        O     O |     14 points
 +13-14-15-16-17-18------19-20-21-22-23-24-+     X: Billie
Pip counts: O 155, X 141

* gnubg moves 24/15*

Rolled 54:*    24/15*


Move number 7: X to play 55

 GNU Backgammon  Position ID: 4NvECQjg28EBUA
                 Match ID   : cIkWANAAcAAA
 +13-14-15-16-17-18------19-20-21-22-23-24-+     O: gnubg
 | X     O     O  O |   | O              X |     13 points
 | X           O  O |   | O                |     
 | X                |   | O                |     
 |                  |   | O                |     
 |                  |   | O                |    
v|                  |BAR|                  |     (Cube: 1)
 |                  |   | X                |    
 |                  |   | X                |     
 | O           X    |   | X                |     
 | O           X  X |   | X                |     Rolled 55
 | O     O     X  X | X | X        O       |     14 points
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     X: Billie
Pip counts: O 146, X 156

* Billie moves bar/15* 8/3*(2)

Cube analysis
0-ply cubeless equity  -0.120
  0.446 0.122 0.003 - 0.554 0.133 0.004
1. No double            -0.168
2. Double, pass         +1.000  ( +1.168)
3. Double, take         -0.617  ( -0.449)
Proper cube action: No double, beaver (27.8%)
Alert: very lucky roll! ( +0.951)

Rolled 55 (+0.951):
*    1. Cubeful 0-ply    bar/15* 8/3*(2)              Eq.:  +0.863
       0.653 0.307 0.016 - 0.347 0.078 0.002
     2. Cubeful 0-ply    bar/15*/10* 8/3*             Eq.:  +0.712 ( -0.151)
       0.642 0.263 0.017 - 0.358 0.084 0.002
     3. Cubeful 0-ply    bar/15*/10* 13/8             Eq.:  +0.599 ( -0.264)
       0.641 0.206 0.009 - 0.359 0.074 0.002
     4. Cubeful 0-ply    bar/15*/10*/5                Eq.:  +0.482 ( -0.381)
       0.620 0.196 0.009 - 0.380 0.081 0.002
     5. Cubeful 0-ply    bar/15*/10* 6/1              Eq.:  +0.413 ( -0.450)
       0.604 0.190 0.008 - 0.396 0.093 0.002


Move number 8: O to play 14

 GNU Backgammon  Position ID: jG/BCSDg2+AEYA
                 Match ID   : MIEQANAAcAAA
 +12-11-10--9--8--7-------6--5--4--3--2--1-+     O: gnubg
 | X     X     O  O | O | O              X |     13 points
 | X           O  O | O | O                |     Rolled 14
 | X                |   | O                |     
 |                  |   | O                |     
 |                  |   | O                |    
^|                  |BAR|                  |     (Cube: 1)
 |                  |   | X                |    
 |                  |   | X                |     
 | O                |   | X                |     
 | O              X |   | X        X       |     
 | O     O     X  X |   | X        X       |     14 points
 +13-14-15-16-17-18------19-20-21-22-23-24-+     X: Billie
Pip counts: O 164, X 136

* gnubg moves bar/24 bar/21

Rolled 14:*    bar/24 bar/21


Game statistics for game 28

Player                          gnubg                   Billie         

Chequerplay statistics

Total moves                       0                       4
Unforced moves                    0                       4
Moves marked very good            0                       0
Moves marked good                 0                       0
Moves marked interesting          0                       0
Moves unmarked                    0                       4
Moves marked doubtful             0                       0
Moves marked bad                  0                       0
Moves marked very bad             0                       0
Error rate (total)              +0.000 ( +0.000)        -0.006 ( -0.006)
Error rate (per move)           +0.000 ( +0.000)        -0.001 ( -0.001)
Chequer play rating             n/a                     Supernatural           

Rolls marked very lucky           0                       1
Rolls marked lucky                0                       0
Rolls unmarked                    0                       3
Rolls marked unlucky              0                       0
Rolls marked very unlucky         0                       0
Luck rate (total)               +0.000 ( +0.000)        +0.623 ( +0.623)
Luck rate (per move)            n/a                     +0.156 ( +0.156) 
Luck rating                     n/a                     Go to Las Vegas immedia


Cube decisions statistics:

Total cube decisions              0                       4
Close or actual cube decisions    0                       1
Doubles                           0                       0
Takes                             0                       0
Pass                              0                       0
Missed doubles around DP          0 (+0.000 ( +0.000)     0 (+0.000 ( +0.000))
Missed doubles around TG          0 (+0.000 ( +0.000)     0 (+0.000 ( +0.000))
Wrong doubles around DP           0 (+0.000 ( +0.000)     0 (+0.000 ( +0.000))
Wrong doubles around TG           0 (+0.000 ( +0.000)     0 (+0.000 ( +0.000))
Wrong takes                       0 (+0.000 ( +0.000)     0 (+0.000 ( +0.000))
Wrong passes                      0 (+0.000 ( +0.000)     0 (+0.000 ( +0.000))
Error rate (total)              +0.000 ( +0.000)        +0.000 ( +0.000)
Error rate (per cube decision)  n/a                     +0.000 ( +0.000) 
Cube decision rating            n/a                     Supernatural           


Overall statistics:

Error rate (total)              +0.000 ( +0.000)        -0.006 ( -0.006)
Error rate (per decision)       n/a                     -0.001 ( -0.001) 
Cube decision rating            n/a                     Supernatural           



Output generated Tue Jan 28 21:13:23 2003
by GNU Backgammon 0.12 (Text Export version 1.33)


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