$ ./smathstudio_desktop_mono (mono:9284): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita", (mono:9284): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita", Stacktrace: at <0xffffffff> at (wrapper managed-to-native) System.Drawing.GDIPlus.GdipCreateFont (intptr,single,System.Drawing.FontStyle,System.Drawing.GraphicsUnit,intptr&) <0x00087> at System.Drawing.Font..ctor (System.Drawing.FontFamily,single,System.Drawing.FontStyle,System.Drawing.GraphicsUnit,byte,bool) <0x000b7> at System.Drawing.Font..ctor (System.Drawing.FontFamily,single,System.Drawing.FontStyle,System.Drawing.GraphicsUnit) <0x0004b> at (wrapper remoting-invoke-with-check) System.Drawing.Font..ctor (System.Drawing.FontFamily,single,System.Drawing.FontStyle,System.Drawing.GraphicsUnit) <0x0008b> at SMath.Control.PaintContext.EquationsFont (single) <0x00083> at SMath.Control.PaintContext.set_NormalFont (System.Drawing.Font) <0x00a53> at SMath.Control.MathRegion.GetPaintContext (System.Drawing.Rectangle,System.Drawing.Graphics) <0x0010f> at SMath.Control.MathRegion.Prepare (System.Drawing.Graphics,System.Windows.Forms.PaintEventArgs) <0x00143> at SMath.Control.MathRegion.PrePainter () <0x00013> at SMath.Control.RegionBase.InitLayout () <0x002a9> at SMath.Control.Worksheet.ElementCreater (SMath.Control.RegionBase,bool,bool,bool) <0x00235> at SMath.Control.Worksheet.CreateRegions (System.Collections.Generic.IEnumerable`1,bool,SMath.Control.LocationCorrectionMode) <0x006eb> at (wrapper remoting-invoke-with-check) SMath.Control.Worksheet.CreateRegions (System.Collections.Generic.IEnumerable`1,bool,SMath.Control.LocationCorrectionMode) <0x0008b> at ...ctor (System.Collections.Generic.List`1) <0x01e2f> at (wrapper remoting-invoke-with-check) ...ctor (System.Collections.Generic.List`1) <0x00043> at .. (string[]) <0x00217> at (wrapper runtime-invoke) .runtime_invoke_void_object (object,intptr,intptr,intptr) <0x000d1> Native stacktrace: mono(+0xc8514) [0x55af327f0514] mono(+0x1217ce) [0x55af328497ce] mono(+0x3d7e3) [0x55af327657e3] /lib/x86_64-linux-gnu/libpthread.so.0(+0x13150) [0x7fdde8069150] /usr/lib/x86_64-linux-gnu/libfontconfig.so.1(+0x1c7cd) [0x7fddde11d7cd] /usr/lib/x86_64-linux-gnu/libfontconfig.so.1(+0x1de29) [0x7fddde11ee29] /usr/lib/x86_64-linux-gnu/libfontconfig.so.1(FcPatternGetString+0x37) [0x7fddde11f0c7] /usr/lib/libgdiplus.so.0(GdipCreateFont+0x59) [0x7fdddf78e2d9] [0x406d4338] Debug info from gdb: [New LWP 9285] [New LWP 9287] [New LWP 9291] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". 0x00007fdde8068a4a in __waitpid (pid=9292, stat_loc=0x7fdde8bee0fc, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:29 29 ../sysdeps/unix/sysv/linux/waitpid.c: No such file or directory. Id Target Id Frame * 1 Thread 0x7fdde8bd2780 (LWP 9284) "Main" 0x00007fdde8068a4a in __waitpid (pid=9292, stat_loc=0x7fdde8bee0fc, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:29 2 Thread 0x7fdde6fff700 (LWP 9285) "SGen worker" 0x00007fdde8064072 in futex_wait_cancelable (private=, expected=0, futex_word=0x55af32ce3a08) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 3 Thread 0x7fdde7782700 (LWP 9287) "Finalizer" 0x00007fdde8066f96 in futex_abstimed_wait_cancelable (private=0, abstime=0x0, expected=0, futex_word=0x55af32cd4640) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 4 Thread 0x7fddd817e700 (LWP 9291) "Main" 0x00007fdde7b67901 in __GI___poll (fds=0x7fdde70025a0, nfds=2, timeout=15) at ../sysdeps/unix/sysv/linux/poll.c:29 Thread 4 (Thread 0x7fddd817e700 (LWP 9291)): #0 0x00007fdde7b67901 in __GI___poll (fds=0x7fdde70025a0, nfds=2, timeout=15) at ../sysdeps/unix/sysv/linux/poll.c:29 #1 0x00000000407450c6 in ?? () #2 0x0000000000000002 in ?? () #3 0x00007fddd817ca90 in ?? () #4 0x00007fdde7002580 in ?? () #5 0x00007fddd7eb8130 in ?? () #6 0x0000000000000002 in ?? () #7 0x00007fddd817d6b0 in ?? () #8 0x00007fddd0001bd0 in ?? () #9 0x00007fddd817ca90 in ?? () #10 0x00007fddd817ca90 in ?? () #11 0x00007fddd817bfe0 in ?? () #12 0x00007fdde70025a0 in ?? () #13 0x00007fddd8170001 in ?? () #14 0x00007fddd817ca90 in ?? () #15 0x0000000040743090 in ?? () #16 0x00007fdde726caf8 in ?? () #17 0x00007fddd817ca90 in ?? () #18 0x00007fddd7efd5f0 in ?? () #19 0x00007fddd7ef01c0 in ?? () #20 0x00007fddd7efd5f0 in ?? () #21 0x00007fdde4e2e8cb in System_Threading_Monitor_Enter_object_bool_ (obj=0xf, lockTaken=140591040046504) from /usr/lib/mono/aot-cache/amd64/mscorlib.dll.so #22 0x0000000040723c64 in ?? () #23 0x00007fdd00000013 in ?? () #24 0x00000000000003bb in ?? () #25 0x0000000000000000 in ?? () Thread 3 (Thread 0x7fdde7782700 (LWP 9287)): #0 0x00007fdde8066f96 in futex_abstimed_wait_cancelable (private=0, abstime=0x0, expected=0, futex_word=0x55af32cd4640) at ../sysdeps/unix/sysv/linux/futex-internal.h:205 #1 do_futex_wait (sem=sem@entry=0x55af32cd4640, abstime=0x0) at sem_waitcommon.c:111 #2 0x00007fdde8067054 in __new_sem_wait_slow (sem=sem@entry=0x55af32cd4640, abstime=0x0) at sem_waitcommon.c:181 #3 0x00007fdde8067144 in __new_sem_wait (sem=0x55af32cd4640) at sem_wait.c:42 #4 0x000055af3290cdc9 in ?? () #5 0x000055af328eabe1 in ?? () #6 0x000055af329aa14a in ?? () #7 0x00007fdde805d7fc in start_thread (arg=0x7fdde7782700) at pthread_create.c:465 #8 0x00007fdde7b73b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 2 (Thread 0x7fdde6fff700 (LWP 9285)): #0 0x00007fdde8064072 in futex_wait_cancelable (private=, expected=0, futex_word=0x55af32ce3a08) at ../sysdeps/unix/sysv/linux/futex-internal.h:88 #1 __pthread_cond_wait_common (abstime=0x0, mutex=0x55af32ce3a20, cond=0x55af32ce39e0) at pthread_cond_wait.c:502 #2 __pthread_cond_wait (cond=0x55af32ce39e0, mutex=0x55af32ce3a20) at pthread_cond_wait.c:655 #3 0x000055af32978863 in ?? () #4 0x00007fdde805d7fc in start_thread (arg=0x7fdde6fff700) at pthread_create.c:465 #5 0x00007fdde7b73b0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 Thread 1 (Thread 0x7fdde8bd2780 (LWP 9284)): #0 0x00007fdde8068a4a in __waitpid (pid=9292, stat_loc=0x7fdde8bee0fc, options=0) at ../sysdeps/unix/sysv/linux/waitpid.c:29 #1 0x000055af327f05f0 in ?? () #2 0x000055af328497ce in ?? () #3 0x000055af327657e3 in ?? () #4 #5 0x00007fddde11d7cd in ?? () from /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 #6 0x00007fddde11ee29 in ?? () from /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 #7 0x00007fddde11f0c7 in FcPatternGetString () from /usr/lib/x86_64-linux-gnu/libfontconfig.so.1 #8 0x00007fdddf78e2d9 in GdipCreateFont () from /usr/lib/libgdiplus.so.0 #9 0x00000000406d4338 in ?? () #10 0x00007fddd7a3c608 in ?? () #11 0x0000000000000000 in ?? () ================================================================= Got a SIGSEGV while executing native code. This usually indicates a fatal error in the mono runtime or one of the native libraries used by your application. ================================================================= Aborted (core dumped) peter@hook:~/Downloads/smath6528$ ls -l total 1544 drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 book drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 entries drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 EULA drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 examples drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 lang drwxrwxr-x 2 peter peter 4096 Nov 16 09:42 plugins drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 representation -rwxrwxr-x 1 peter peter 409400 Nov 16 09:42 SMath.Controls.dll -rwxrwxr-x 1 peter peter 259384 Nov 16 09:42 SMath.Manager.dll -rwxrwxr-x 1 peter peter 117560 Nov 16 09:42 SMath.Math.Numeric.dll -rwxrwxr-x 1 peter peter 85816 Nov 16 09:42 SMath.Math.Symbolic.dll -rwxrwxr-x 1 peter peter 588088 Nov 16 09:42 SMathStudio_Desktop.exe -rwxrwxr-x 1 peter peter 192 Nov 7 22:46 SMathStudio_Desktop.exe.config -rwxrwxr-x 1 peter peter 54 May 30 2013 smathstudio_desktop_mono -rwxrwxr-x 1 peter peter 68408 Nov 16 09:42 SMath.UI.dll drwxrwxr-x 2 peter peter 4096 Nov 16 09:40 snippets peter@hook:~/Downloads/smath6528$