ED_vsprintf and Q_sscanf crash on GNU/Linux x86_64

[zturtleman]

ED_vsprintf and Q_sscanf crash on map load / client start up on GNU/Linux x86_64. Ran with Quake3e git master. The game works after replacing the functions with system vsprintf and sscanf though.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff191e5a1 in Q_strlen (s=0x3000000008 <error: Cannot access memory at address 0x3000000008>) at ../../code/game/bg_misc.c:2099
2099		while ( *s != '\0' ) 
(gdb) bt
#0  0x00007ffff191e5a1 in Q_strlen (s=0x3000000008 <error: Cannot access memory at address 0x3000000008>) at ../../code/game/bg_misc.c:2099
#1  0x00007ffff191e9fc in AddString (buf_p=0x7fffffffb1b8, string=0x3000000008 <error: Cannot access memory at address 0x3000000008>, width=0, prec=-1) at ../../code/game/bg_misc.c:2279
#2  0x00007ffff191ec98 in ED_vsprintf (buffer=0x7fffffffb200 "gamename: me Initialization -------\n", fmt=0x7ffff1950669 "\n", argptr=0x7fffffffd200) at ../../code/game/bg_misc.c:2403
#3  0x00007ffff18f2d25 in G_Printf (fmt=0x7ffff195065d "gamename: %s\n") at ../../code/game/g_main.c:230
#4  0x00007ffff18f360f in G_InitGame (levelTime=0, randomSeed=12894, restart=0) at ../../code/game/g_main.c:489
#5  0x00007ffff18f2bc4 in vmMain (command=0, arg0=0, arg1=12894, arg2=0) at ../../code/game/g_main.c:189

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff191f04b in Q_sscanf (buffer=0x7ffff1cd8910 <level+4048> "", fmt=0x7ffff1956940 "") at ../../code/game/bg_misc.c:2652
2652				*(float *)*arg = _atof( &buffer );
(gdb) bt
#0  0x00007ffff191f04b in Q_sscanf (buffer=0x7ffff1cd8910 <level+4048> "", fmt=0x7ffff1956940 "") at ../../code/game/bg_misc.c:2652
#1  0x00007ffff193dab5 in G_ParseField (key=0x7ffff1cd88fc <level+4028> "origin", value=0x7ffff1cd8903 <level+4035> "", ent=0x7ffff1be01f8 <g_entities+69496>) at ../../code/game/g_spawn.c:351
#2  0x00007ffff193dc3b in G_SpawnGEntityFromSpawnVars () at ../../code/game/g_spawn.c:398
#3  0x00007ffff193e3a1 in G_SpawnEntitiesFromString () at ../../code/game/g_spawn.c:627
#4  0x00007ffff18f3873 in G_InitGame (levelTime=0, randomSeed=5487, restart=0) at ../../code/game/g_main.c:566
#5  0x00007ffff18f2ba4 in vmMain (command=0, arg0=0, arg1=5487, arg2=0) at ../../code/game/g_main.c:189