Backtrace in gdb:

Program received signal SIGSEGV, Segmentation fault.
0x004a4ae0 in HandleTransparencyBitmask_raw (tmap=0x1e691ef8, x0=16, y0=0,
flags=0) at src/tilemap.c:2258
2258 if( bDontIgnoreTransparency && (pBitmask[bitoffs
/8]&(0x80>>(bitoffs&7))) == 0 )
(gdb) bt
#0 0x004a4ae0 in HandleTransparencyBitmask_raw (tmap=0x1e691ef8, x0=16, y0=0,
flags=0) at src/tilemap.c:2258
#1 0x004a6ac9 in update_tile_info (tmap=0x1e691ef8, cached_indx=1, col=1,
row=0) at src/tilemap.c:1046
#2 0x004a6bd7 in tilemap_get_pixmap (tmap=0x1e691ef8) at src/tilemap.c:1080
#3 0x00e62acc in DrawRozHelper (bitmap=0x17541fe4, tmap=0x1e691ef8,
clip=0x22fc60, rozInfo=0x22fbe0) at src/drivers/namcoic.c:1192
#4 0x00e62f13 in namco_roz_draw (bitmap=0x17541fe4, cliprect=0x22fc60, pri=4)
at src/drivers/namcoic.c:1299
#5 0x00e68f9b in video_update_metlhawk (machine=0x7431dc0, screen=0,
bitmap=0x17541fe4, cliprect=0x22fca0) at src/vidhrdw/namcos2.c:519
#6 0x004b9220 in video_screen_update_partial (scrnum=0, scanline=223)
at src/video.c:578
#7 0x004b9b25 in video_frame_update () at src/video.c:771
#8 0x004d287d in debug_refresh_display () at src/debug/debugcpu.c:532
#9 0x004d2d83 in mame_debug_hook () at src/debug/debugcpu.c:820
#10 0x008c7cb6 in m68k_execute (num_cycles=2027)
at src/cpu/m68000/m68kcpu.c:811
#11 0x00723c87 in m68000_execute (cycles=2027) at src/cpu/m68000/m68kmame.c:216
#12 0x00421734 in cpunum_execute (cpunum=0, cycles=2027) at src/cpuintrf.c:1353
#13 0x0041cc7e in cpuexec_timeslice () at src/cpuexec.c:502
#14 0x00470864 in run_game (game=626) at src/mame.c:339
#15 0x005247c1 in utf8_main (argc=6, argv=0x40b1fe8)
at src/windows/winmain.c:152
#16 0x013fd311 in main (argc=6, a_argv=0x3fc2500) at src/windows/main.c:61

Backtrace on command-line:

-----------------------------------------------------
Exception at EIP=004A4AE0 (tilemap_scan_cols_flip_xy+0x5ae8): ACCESS VIOLATION
While attempting to read memory at 0AD70E20
-----------------------------------------------------
EAX=0AD70E20 EBX=0001E53E ECX=00000000 EDX=00000000
ESI=1B235C20 EDI=0012FA3C EBP=0022FAE8 ESP=0022FA80
-----------------------------------------------------
Stack crawl:
exception-> 004A4AE0 (tilemap_scan_cols_flip_xy+0x5ae8)
0022FAEC: 004A6AC9 (tilemap_mark_all_tiles_dirty+0x00e2)
0022FB1C: 004A6BD7 (tilemap_get_pixmap+0x00f0)
0022FB4C: 00E62ACC (namco_roz_init+0x03a5)
0022FBBC: 00E62F13 (namco_roz_draw+0x0101)
0022FC3C: 00E68F9B (video_update_metlhawk+0x0099)
0022FC7C: 004B9220 (video_screen_update_partial+0x010c)
0022FCCC: 004B9B25 (video_frame_update+0x0096)
0022FD2C: 004D287D (debug_refresh_display+0x000b)
0022FD3C: 004D2D83 (mame_debug_hook+0x03dd)
0022FD7C: 00420B27 (activecpu_get_info_int+0x0072)
0022FDDC: 00421734 (cpunum_execute+0x0084)
0022FDFC: 0041CC7E (cpuexec_timeslice+0x0212)
0022FEDC: 00470864 (run_game+0x01b4)
0022FF0C: 005247C1 (utf8_main+0x0131)
0022FF3C: 013FD311 (main+0x00d1)
0022FF7C: 00401237 (__image_base__+0x1237)
0022FFB4: 00401288 (mainCRTStartup+0x0018)
