(gdb) run
Starting program: Z:\gametest2\gtest\bin\win64\chessmates.exe
[New Thread 9320.0x2b50]
[New Thread 9320.0x101c]
[New Thread 9320.0x1dd0]
[New Thread 9320.0x189c]
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 9320.0x22ac]
[New Thread 9320.0x2e08]
[New Thread 9320.0x2fb4]
[New Thread 9320.0x15b4]
[New Thread 9320.0x2bb8]
[New Thread 9320.0x27b0]
[New Thread 9320.0x1268]
[Thread 9320.0x2bb8 exited with code 0]
[Thread 9320.0x27b0 exited with code 0]
[Thread 9320.0x1268 exited with code 0]
[New Thread 9320.0x1a20]
[New Thread 9320.0x1914]
[New Thread 9320.0x2708]
[New Thread 9320.0xfd0]
[New Thread 9320.0x2f40]
[New Thread 9320.0x1178]
[New Thread 9320.0x2e94]

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()
A syntax error in expression, near `)'.
(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  0x000000000040f908 in wl_gl_DrawRect (rect=...) at src/wlgui/wldraw.c:16
#4  0x000000000040fd53 in wl_gl_DrawWidget (widget=0x63293b0) at src/wlgui/wldraw.c:115
#5  0x000000000040fdb4 in wl_gl_DrawWidget (widget=0x165a60) at src/wlgui/wldraw.c:131
#6  0x00000000004110dd in wl_sdl2_gl_exec (inf=<optimized out>) at src/wlgui/wlut.c:156
#7  0x00000000004119cf in wlutInfExecute (inf=0x63996d0) at src/wlgui/wlut.c:103
#8  0x0000000000411b14 in wl_sdl2_gl_ExecuteContext (widget=widget@entry=0x165a60) at src/wlgui/wlut.c:233
#9  0x0000000000403d47 in SDL_main (argc=<optimized out>, argv=<optimized out>) at src/main.c:1070
#10 0x0000000000413447 in main_getcmdline ()
#11 0x00000000004013a5 in __tmainCRTStartup ()
    at /shr/mingw/mingw-w64-crt/src/mingw-w64-v7.0.0/mingw-w64-crt/crt/crtexe.c:339
#12 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 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  0x000000000040f908 in wl_gl_DrawRect (rect=...) at src/wlgui/wldraw.c:16
#4  0x000000000040fd53 in wl_gl_DrawWidget (widget=0x63293b0) at src/wlgui/wldraw.c:115
#5  0x000000000040fdb4 in wl_gl_DrawWidget (widget=0x165a60) at src/wlgui/wldraw.c:131
#6  0x00000000004110dd in wl_sdl2_gl_exec (inf=<optimized out>) at src/wlgui/wlut.c:156
#7  0x00000000004119cf in wlutInfExecute (inf=0x63996d0) at src/wlgui/wlut.c:103
#8  0x0000000000411b14 in wl_sdl2_gl_ExecuteContext (widget=widget@entry=0x165a60) at src/wlgui/wlut.c:233
#9  0x0000000000403d47 in SDL_main (argc=<optimized out>, argv=<optimized out>) at src/main.c:1070
#10 0x0000000000413447 in main_getcmdline ()
#11 0x00000000004013a5 in __tmainCRTStartup ()
    at /shr/mingw/mingw-w64-crt/src/mingw-w64-v7.0.0/mingw-w64-crt/crt/crtexe.c:339
#12 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 9320.0x1a20 exited with code 3221225477]
[Thread 9320.0x2e94 exited with code 3221225477]
[Thread 9320.0x101c exited with code 3221225477]
[Thread 9320.0x1914 exited with code 3221225477]
[Thread 9320.0x189c exited with code 3221225477]
[Thread 9320.0x1dd0 exited with code 3221225477]
[Thread 9320.0x22ac exited with code 3221225477]
[Thread 9320.0x1178 exited with code 3221225477]
[Thread 9320.0x2708 exited with code 3221225477]
[Thread 9320.0x2e08 exited with code 3221225477]
[Thread 9320.0x2fb4 exited with code 3221225477]
[Thread 9320.0x2f40 exited with code 3221225477]
[Thread 9320.0xfd0 exited with code 3221225477]
[Inferior 1 (process 9320) exited with code 030000000005]
(gdb)