Reading symbols from chessmates...done.
(gdb) bt
No stack.
(gdb) run
Starting program: Z:\gametest1\gtest\bin\win64\chessmates.exe
[New Thread 8824.0x1bdc]
[New Thread 8824.0x2678]
[New Thread 8824.0x2740]
[New Thread 8824.0x2f10]
warning: [S_API] SteamAPI_Init(): SteamAPI_IsSteamRunning() did not locate a running instance of Steam.
warning: [S_API] SteamAPI_Init(): Loaded 'C:\Program Files (x86)\Steam\steamclient64.dll' OK.
warning: [S_API FAIL] SteamAPI_Init() failed; create pipe failed.
[New Thread 8824.0x2140]
[New Thread 8824.0x1820]
[New Thread 8824.0x1674]
[New Thread 8824.0x1e54]
[New Thread 8824.0x26d0]
[New Thread 8824.0x2e80]
[New Thread 8824.0x19e8]
[Thread 8824.0x26d0 exited with code 0]
[Thread 8824.0x19e8 exited with code 0]
[Thread 8824.0x2e80 exited with code 0]
[New Thread 8824.0x2398]
[New Thread 8824.0x1a2c]
[New Thread 8824.0x203c]
[New Thread 8824.0x1628]
[New Thread 8824.0x128c]
[New Thread 8824.0x77c]

Thread 1 "MainThrd" received signal SIGSEGV, Segmentation fault.
0x000000006af594e0 in vk_optimusGetInstanceProcAddr ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
(gdb) bt
#0  0x000000006af594e0 in vk_optimusGetInstanceProcAddr ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
#1  0x000000006aa2c7fa in ?? ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
#2  0x000000006aa2d5e4 in ?? ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
#3  0x000000000040b743 in draw (widget=<optimized out>) at src/draw.c:345
#4  0x000000000040fb84 in wl_gl_DrawWidget (widget=0x1735a60) at src/wlgui/wldraw.c:87
#5  0x000000000041109d in wl_sdl2_gl_exec (inf=<optimized out>) at src/wlgui/wlut.c:156
#6  0x000000000041198f in wlutInfExecute (inf=0x63c96d0) at src/wlgui/wlut.c:103
#7  0x0000000000411ad4 in wl_sdl2_gl_ExecuteContext (widget=widget@entry=0x1735a60) at src/wlgui/wlut.c:233
#8  0x0000000000403d47 in SDL_main (argc=<optimized out>, argv=<optimized out>) at src/main.c:1070
#9  0x0000000000413407 in main_getcmdline ()
#10 0x00000000004013a5 in __tmainCRTStartup ()
    at /shr/mingw/mingw-w64-crt/src/mingw-w64-v7.0.0/mingw-w64-crt/crt/crtexe.c:339
#11 0x00000000004014db in WinMainCRTStartup ()
    at /shr/mingw/mingw-w64-crt/src/mingw-w64-v7.0.0/mingw-w64-crt/crt/crtexe.c:195
(gdb) continue
Continuing.
[New Thread 8824.0x2bf0]

Thread 1 "MainThrd" received signal SIGSEGV, Segmentation fault.
0x000000006af594e0 in vk_optimusGetInstanceProcAddr ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
(gdb) bt
#0  0x000000006af594e0 in vk_optimusGetInstanceProcAddr ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
#1  0x000000006aa2c7fa in ?? ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
#2  0x000000006aa2d5e4 in ?? ()
   from C:\windows\System32\DriverStore\FileRepository\nvhmi.inf_amd64_ef5aa08b9c75840e\nvoglv64.dll
#3  0x000000000040b743 in draw (widget=<optimized out>) at src/draw.c:345
#4  0x000000000040fb84 in wl_gl_DrawWidget (widget=0x1735a60) at src/wlgui/wldraw.c:87
#5  0x000000000041109d in wl_sdl2_gl_exec (inf=<optimized out>) at src/wlgui/wlut.c:156
#6  0x000000000041198f in wlutInfExecute (inf=0x63c96d0) at src/wlgui/wlut.c:103
#7  0x0000000000411ad4 in wl_sdl2_gl_ExecuteContext (widget=widget@entry=0x1735a60) at src/wlgui/wlut.c:233
#8  0x0000000000403d47 in SDL_main (argc=<optimized out>, argv=<optimized out>) at src/main.c:1070
#9  0x0000000000413407 in main_getcmdline ()
#10 0x00000000004013a5 in __tmainCRTStartup ()
    at /shr/mingw/mingw-w64-crt/src/mingw-w64-v7.0.0/mingw-w64-crt/crt/crtexe.c:339
#11 0x00000000004014db in WinMainCRTStartup ()
    at /shr/mingw/mingw-w64-crt/src/mingw-w64-v7.0.0/mingw-w64-crt/crt/crtexe.c:195
(gdb) continue
Continuing.
[Thread 8824.0x2140 exited with code 3221225477]
[Thread 8824.0x2398 exited with code 3221225477]
[Thread 8824.0x1a2c exited with code 3221225477]
[Thread 8824.0x2740 exited with code 3221225477]
[Thread 8824.0x2f10 exited with code 3221225477]
[Thread 8824.0x203c exited with code 3221225477]
[Thread 8824.0x1e54 exited with code 3221225477]
[Thread 8824.0x77c exited with code 3221225477]
[Thread 8824.0x1674 exited with code 3221225477]
[Thread 8824.0x1628 exited with code 3221225477]
[Thread 8824.0x128c exited with code 3221225477]
[Thread 8824.0x2bf0 exited with code 3221225477]
[Thread 8824.0x1820 exited with code 3221225477]
[Thread 8824.0x2678 exited with code 3221225477]
[Inferior 1 (process 8824) exited with code 030000000005]
(gdb) bt
No stack.
(gdb)