WolfenDoom causes 100% CPU with C++ version

[angelic]

./Legacy -opengl -nocheckwadversion -iwad /usr/local/games/doom/wads/doom2.wad -file /usr/local/games/doom/wads/original.wad

CPU% goes to 100% and no Doom appears. Nothing in stderr.out

stdout.out contains:
[andyp@castor doomlegacy_c++]$ more stdout.txt
Apr 18 2004 Doom Legacy 1.50 prealpha2 17:08:53
DOOM 2: Hell on Earth

Z_Init: Init zone memory allocation daemon.
W_Init: Init WADfiles.
Warning: Lumpname RSKY2 not padded with zeros!
Warning: Lumpname RSKY3 not padded with zeros!
Warning: Lumpname WATER6 not padded with zeros!
Warning: Lumpname WATER7 not padded with zeros!
Warning: Lumpname ENDOOM not padded with zeros!
Warning: Lumpname TNT1A0 not padded with zeros!
Warning: Lumpname SS_END not padded with zeros!
Warning: Lumpname DSOUCH not padded with zeros!
Warning: Lumpname DSJUMP not padded with zeros!
Added PWAD file legacy.wad (80 lumps)
Added IWAD file /usr/local/games/doom/wads/doom2.wad (2919 lumps)
Added PWAD file /usr/local/games/doom/wads/original.wad (1748 lumps)
COM_Init: Init the command buffer
Sys_Init: Init system-specific stuff.
SV_Init
gravity set to 1
CL_Init

InitTextures...PNAMES: lump 1:359, 469 patches
TEXTURE1: lump 1:358, 428 textures, maxoff 21252
Defitem SMOKA0, rc = 1, use = 0
- PIPE2, rc = 0, use = 0
- PIPE4, rc = 0, use = 0
[...snip... etc...]
InitSprites...
Sprite: PLAY |

That's all.