gnugo.exe caused an Access Violation at location 004af49e in module gnugo.exe Reading from location 000c01c4.

Registers:
eax=000c01b8 ebx=000c01b8 ecx=77c1196d edx=00000000 esi=0077ccf0 edi=00000001
eip=004af49e esp=0022fe10 ebp=0022fe18 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000206

Call stack:
004AF49E  gnugo.exe:004AF49E  sgfFreeNode  sgfnode.c:121
void sgfFreeNode(
	SGFNode * node = &{
		SGFProperty * props = ,
		struct SGFNode_t * parent = ,
		struct SGFNode_t * child = ,
		struct SGFNode_t * next = 
	}
)
	...
	  if (node == NULL)
	    return;
>	  sgfFreeNode(node->next);
	  sgfFreeNode(node->child);
	  sgfFreeProperty(node->props);
	...

004AF4A9  gnugo.exe:004AF4A9  sgfFreeNode  sgfnode.c:122
void sgfFreeNode(
	SGFNode * node = &{
		SGFProperty * props = 0x003d0030,
		struct SGFNode_t * parent = 0x003d2ce8,
		struct SGFNode_t * child = 0x00020003,
		struct SGFNode_t * next = 0x000c01b8
	}
)
	...
	    return;
	  sgfFreeNode(node->next);
>	  sgfFreeNode(node->child);
	  sgfFreeProperty(node->props);
	  free(node);
	...

004AF4B4  gnugo.exe:004AF4B4  sgfFreeNode  sgfnode.c:123
void sgfFreeNode(
	SGFNode * node = &{
		SGFProperty * props = 0x00000000,
		struct SGFNode_t * parent = 0x00004148,
		struct SGFNode_t * child = 0x003d2cd8,
		struct SGFNode_t * next = 0x00000000
	}
)
	...
	  sgfFreeNode(node->next);
	  sgfFreeNode(node->child);
>	  sgfFreeProperty(node->props);
	  free(node);
	}
	...

00402522  gnugo.exe:00402522  main  main.c:1388
int main(
	int argc = 9,
	char * * argv = &0x003d2c61
)
	...
	
	  clock_report_autolevel(NULL, gameinfo.computer_player);
>	  sgfFreeNode(gameinfo.game_record.root);
	 
	  return 0;
	...

00401247  gnugo.exe:00401247
00401298  gnugo.exe:00401298
7C816FD7  kernel32.dll:7C816FD7  RegisterWaitForInputIdle