#0  0x00007ffff61989f5 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff6199e87 in __GI_abort () at abort.c:89
#2  0x00007ffff61d8f97 in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7ffff62cb0b8 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3  0x00007ffff61dec1d in malloc_printerr (action=3, str=0x7ffff62cb1c0 "double free or corruption (!prev)", ptr=<optimized out>) at malloc.c:4991
#4  0x00007ffff61dfe3a in _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3837
#5  0x00007ffff10c7756 in si_pm4_free_state (sctx=0x3a5d3a0, state=0x3eed370, idx=18) at si_pm4.c:161
#6  0x00007ffff10d4a69 in si_delete_shader_selector (ctx=0x3a5d3a0, sel=0x3982450) at si_state.c:2364
#7  0x00007ffff10d4b0c in si_delete_vs_shader (ctx=0x3a5d3a0, state=0x3982450) at si_state.c:2383
#8  0x00007ffff0f91819 in pp_free (ppq=0x3a5b800) at postprocess/pp_init.c:212
#9  0x00007ffff10eff96 in dri_destroy_context (cPriv=0x3823b80) at dri_context.c:195
#10 0x00007ffff0c6fedf in driDestroyContext (pcp=0x3823b80) at dri_util.c:490
#11 0x00007ffff6d7987c in dri2_destroy_context (context=0x3a7ef50) at dri2_glx.c:132
#12 0x00007ffff6d3b5d0 in glXDestroyContext (dpy=0x3798d50, ctx=0x3a7ef50) at glxcmds.c:475
#13 0x00007ffff76ab81d in X11_GL_DeleteContext (_this=<optimized out>, context=<optimized out>) at /var/tmp/portage/media-libs/libsdl2-2.0.3-r200/work/SDL2-2.0.3/src/video/x11/SDL_x11opengl.c:817
#14 0x00007ffff764f964 in GL_DestroyRenderer (renderer=0x3902b90) at /var/tmp/portage/media-libs/libsdl2-2.0.3-r200/work/SDL2-2.0.3/src/render/opengl/SDL_render_gl.c:1447
#15 0x000000000052a8cb in GFX_SetSDLWindowMode (width=2560, height=1440, fullscreen=true, screenType=SCREEN_TEXTURE) at sdlmain.cpp:545
#16 0x000000000052aea8 in GFX_SetupWindowScaled (screenType=SCREEN_TEXTURE) at sdlmain.cpp:713
#17 0x000000000052b41b in GFX_SetSize (width=640, height=400, flags=4488, scalex=1, scaley=1, callback=0x540a3a <RENDER_CallBack(GFX_CallBackFunctions_t)>) at sdlmain.cpp:921
#18 0x0000000000540726 in RENDER_Reset () at render.cpp:422
#19 0x0000000000540bd5 in RENDER_SetSize (width=320, height=200, bpp=8, fps=70.0863037, ratio=1.2001250000000001, dblw=true, dblh=true) at render.cpp:534
#20 0x00000000004ff0db in VGA_SetupDrawing () at vga_draw.cpp:1595
#21 0x00000000004ef5fe in PIC_RunQueue () at pic.cpp:486
#22 0x0000000000409358 in Normal_Loop () at dosbox.cpp:135
#23 0x0000000000409797 in DOSBOX_RunMachine () at dosbox.cpp:252
#24 0x000000000040fcbe in CALLBACK_RunRealInt (intnum=33 '!') at callback.cpp:105
#25 0x00000000006b8cbf in DOS_Shell::Execute (this=0x3823a80, name=0x7fffffffbb40 "KEEN4.exe", args=0x7fffffffcc39 "") at shell_misc.cpp:509
#26 0x00000000006b00e5 in DOS_Shell::DoCommand (this=0x3823a80, line=0x7fffffffcc39 "") at shell_cmds.cpp:157
#27 0x00000000006ad67f in DOS_Shell::ParseLine (this=0x3823a80, line=0x7fffffffcc30 "KEEN4.exe") at shell.cpp:250
#28 0x00000000006adb18 in DOS_Shell::Run (this=0x3823a80) at shell.cpp:322
#29 0x00000000006ae55f in SHELL_Init () at shell.cpp:671
#30 0x00000000006a752a in Config::StartUp (this=0x7fffffffdd70) at setup.cpp:878
#31 0x0000000000530f37 in main (argc=1, argv=0x7fffffffdf78) at sdlmain.cpp:3076