Sauer Segmentation fault

alebrije@mint-pc ~/sauerbraten/sauerbraten $ gdb ./bin_unix/native_client
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Reading symbols from ./bin_unix/native_client...done.
(gdb) run
Starting program: /home/alebrije/sauerbraten/sauerbraten/bin_unix/native_client
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
init: sdl
[New Thread 0x7fffecbe2700 (LWP 7534)]
[New Thread 0x7fffe7dce700 (LWP 7535)]
[Thread 0x7fffe7dce700 (LWP 7535) exited]
Library: SDL 1.2.15
init: net
init: game
init: video: mode
[New Thread 0x7fffe7dce700 (LWP 7536)]
init: video: misc
init: gl
Renderer: Gallium 0.4 on AMD ARUBA (X.Org)
Driver: 3.0 Mesa 10.3.2
Rendering using the OpenGL GLSL shader path.
init: console
init: gl: effects
init: world
init: sound
[New Thread 0x7fffe75cd700 (LWP 7538)]
init: cfg
init: mainloop
Rendering using the OpenGL GLSL shader path.
read map packages/base/capture_night.ogz (0.1 seconds)
capture_night by TUX
game mode is effic ctf
Efficiency Capture The Flag: Capture the enemy flag and bring it back to your flag to score points for your team. You spawn with all weapons and armour. There are no items.
loaded 2667 waypoints from packages/base/capture_night.wpt
join: bot [132]
join: bot [131]
join: bot [130]
join: bot [129]
join: bot [128]
bot [129] stole your flag
you stole the enemy flag
bot [132] fragged bot [129]
bot [129] dropped your flag
bot [132] returned your flag
you got fragged by bot [128]
you dropped the enemy flag
bot [128] returned the enemy flag
bot [132] fragged bot [131]
bot [128] stole your flag
bot [132] stole the enemy flag

Program received signal SIGSEGV, Segmentation fault.
0x000000000064d520 in ai::closestwaypoint (pos=..., mindist=mindist@entry=64,
    links=links@entry=true, d=d@entry=0x0) at fpsgame/waypoint.cpp:235
235	                CHECKCLOSEST(curnode->childindex(0));
(gdb) bt
#0  0x000000000064d520 in ai::closestwaypoint (pos=...,
    mindist=mindist@entry=64, links=links@entry=true, d=d@entry=0x0)
    at fpsgame/waypoint.cpp:235
#1  0x00000000005f4adb in ai::makeroute (d=0x6342720, b=..., pos=...,
    changed=<optimized out>, retries=0) at fpsgame/ai.cpp:242
#2  0x0000000000616545 in game::ctfclientmode::aihomerun (
    this=0x9753e0 <game::ctfmode>, d=0x6342720, b=...) at fpsgame/ctf.h:1006
#3  0x00000000005fd465 in check (b=..., d=0x6342720) at fpsgame/ai.cpp:635
#4  dointerest (b=..., d=0x6342720) at fpsgame/ai.cpp:689
#5  ai::think (d=0x6342720, run=true) at fpsgame/ai.cpp:1306
#6  0x00000000005fd646 in ai::update () at fpsgame/ai.cpp:202
#7  0x000000000061c661 in game::updateworld () at fpsgame/fps.cpp:246
#8  0x000000000040daf5 in main (argc=<optimized out>, argv=<optimized out>)
    at engine/main.cpp:1238
(gdb)