OpenFileDialog.ShowAsync segfaults on Linux

this.FindControl<Button>("Da").Click += async (_, __) =>
{
    var dialog = new OpenFileDialog();
    var file = await dialog.ShowAsync(this);
    Console.WriteLine(file[0]);
};

Causes a segfault inside GTK's drawing code.

Back trace from lldb

``` $ lldb -- /opt/dotnet/dotnet SS14.Launcher.dll (lldb) target create "/opt/dotnet/dotnet" Current executable set to '/opt/dotnet/dotnet' (x86_64). (lldb) settings set -- target.run-args "SS14.Launcher.dll" (lldb) r Process 6679 launched: '/opt/dotnet/dotnet' (x86_64) Process 6679 stopped * thread #9, name = 'dotnet', stop reason = signal SIGSEGV: address access protected (fault address: 0x7fffe7b198d0) frame #0: 0x00007fffe7b198d0 libSkiaSharp.so -> 0x7fffe7b198d0: rcr dh, 0x61 0x7fffe7b198d3: out 0xff, eax 0x7fffe7b198d5: jg 0x7fffe7b198d7 0x7fffe7b198d7: add al, al (lldb) bt * thread #9, name = 'dotnet', stop reason = signal SIGSEGV: address access protected (fault address: 0x7fffe7b198d0) * frame #0: 0x00007fffe7b198d0 libSkiaSharp.so frame #1: 0x00007fff7d23b9c8 libfreetype.so.6`___lldb_unnamed_symbol117$$libfreetype.so.6 + 344 frame #2: 0x00007fff20c447ed libcairo.so.2`___lldb_unnamed_symbol2013$$libcairo.so.2 + 2477 frame #3: 0x00007fff20beceb1 libcairo.so.2`___lldb_unnamed_symbol1100$$libcairo.so.2 + 113 frame #4: 0x00007fff20c21a48 libcairo.so.2`___lldb_unnamed_symbol1684$$libcairo.so.2 + 2792 frame #5: 0x00007fff20c038c2 libcairo.so.2`___lldb_unnamed_symbol1364$$libcairo.so.2 + 450 frame #6: 0x00007fff20c03df7 libcairo.so.2`___lldb_unnamed_symbol1365$$libcairo.so.2 + 183 frame #7: 0x00007fff20bab5c1 libcairo.so.2`___lldb_unnamed_symbol219$$libcairo.so.2 + 129 frame #8: 0x00007fff20c26160 libcairo.so.2`___lldb_unnamed_symbol1728$$libcairo.so.2 + 176 frame #9: 0x00007fff20bfd6c9 libcairo.so.2`___lldb_unnamed_symbol1308$$libcairo.so.2 + 713 frame #10: 0x00007fff20bb5082 libcairo.so.2`___lldb_unnamed_symbol475$$libcairo.so.2 + 386 frame #11: 0x00007fff20c0a342 libcairo.so.2`cairo_show_glyphs + 34 frame #12: 0x00007fff2063e6e4 libpangocairo-1.0.so.0`___lldb_unnamed_symbol56$$libpangocairo-1.0.so.0 + 660 frame #13: 0x00007fff2063e90d libpangocairo-1.0.so.0`___lldb_unnamed_symbol57$$libpangocairo-1.0.so.0 + 365 frame #14: 0x00007fff20b4aed0 libpango-1.0.so.0`pango_renderer_draw_glyph_item + 64 frame #15: 0x00007fff20b5069a libpango-1.0.so.0`pango_renderer_draw_layout_line + 1098 frame #16: 0x00007fff20b50af8 libpango-1.0.so.0`pango_renderer_draw_layout + 312 frame #17: 0x00007fff2063ad99 libpangocairo-1.0.so.0`___lldb_unnamed_symbol42$$libpangocairo-1.0.so.0 + 57 frame #18: 0x00007fff0ba81211 libgtk-3.so.0`gtk_render_layout + 449 frame #19: 0x00007fff0bb05b12 libgtk-3.so.0`___lldb_unnamed_symbol6216$$libgtk-3.so.0 + 338 frame #20: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #21: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #22: 0x00007fff0bafc601 libgtk-3.so.0`___lldb_unnamed_symbol6107$$libgtk-3.so.0 + 17 frame #23: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #24: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #25: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #26: 0x00007fff0bc031ad libgtk-3.so.0`___lldb_unnamed_symbol9650$$libgtk-3.so.0 + 29 frame #27: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #28: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #29: 0x00007fff0bc037a1 libgtk-3.so.0`___lldb_unnamed_symbol9666$$libgtk-3.so.0 + 17 frame #30: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #31: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #32: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #33: 0x00007fff0bb70a4d libgtk-3.so.0`___lldb_unnamed_symbol7540$$libgtk-3.so.0 + 45 frame #34: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #35: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #36: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #37: 0x00007fff0ba7a8f9 libgtk-3.so.0`___lldb_unnamed_symbol4558$$libgtk-3.so.0 + 57 frame #38: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #39: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #40: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #41: 0x00007fff0baf6b4d libgtk-3.so.0`___lldb_unnamed_symbol6018$$libgtk-3.so.0 + 29 frame #42: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #43: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #44: 0x00007fff0baf3a45 libgtk-3.so.0`___lldb_unnamed_symbol5995$$libgtk-3.so.0 + 21 frame #45: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #46: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #47: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #48: 0x00007fff0baf253d libgtk-3.so.0`___lldb_unnamed_symbol5957$$libgtk-3.so.0 + 29 frame #49: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #50: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #51: 0x00007fff0baf3a65 libgtk-3.so.0`___lldb_unnamed_symbol5996$$libgtk-3.so.0 + 21 frame #52: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #53: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #54: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #55: 0x00007fff0ba90bd4 libgtk-3.so.0`___lldb_unnamed_symbol4860$$libgtk-3.so.0 + 244 frame #56: 0x00007fff0b9b076f libgtk-3.so.0`___lldb_unnamed_symbol2776$$libgtk-3.so.0 + 239 frame #57: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #58: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #59: 0x00007fff0b9b07c0 libgtk-3.so.0`___lldb_unnamed_symbol2777$$libgtk-3.so.0 + 64 frame #60: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #61: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #62: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #63: 0x00007fff0ba6c470 libgtk-3.so.0`___lldb_unnamed_symbol4455$$libgtk-3.so.0 + 112 frame #64: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #65: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #66: 0x00007fff0ba67171 libgtk-3.so.0`___lldb_unnamed_symbol4394$$libgtk-3.so.0 + 17 frame #67: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #68: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #69: 0x00007fff0babaec3 libgtk-3.so.0`___lldb_unnamed_symbol5324$$libgtk-3.so.0 + 355 frame #70: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #71: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #72: 0x00007fff0bab8ac1 libgtk-3.so.0`___lldb_unnamed_symbol5293$$libgtk-3.so.0 + 17 frame #73: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #74: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #75: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #76: 0x00007fff0bc031ad libgtk-3.so.0`___lldb_unnamed_symbol9650$$libgtk-3.so.0 + 29 frame #77: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #78: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #79: 0x00007fff0bc037a1 libgtk-3.so.0`___lldb_unnamed_symbol9666$$libgtk-3.so.0 + 17 frame #80: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #81: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #82: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #83: 0x00007fff0bc031ad libgtk-3.so.0`___lldb_unnamed_symbol9650$$libgtk-3.so.0 + 29 frame #84: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #85: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #86: 0x00007fff0bc037a1 libgtk-3.so.0`___lldb_unnamed_symbol9666$$libgtk-3.so.0 + 17 frame #87: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #88: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #89: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #90: 0x00007fff0bc031ad libgtk-3.so.0`___lldb_unnamed_symbol9650$$libgtk-3.so.0 + 29 frame #91: 0x00007fff0bbb09bd libgtk-3.so.0`___lldb_unnamed_symbol8587$$libgtk-3.so.0 + 29 frame #92: 0x00007fff0bbbad31 libgtk-3.so.0`___lldb_unnamed_symbol8758$$libgtk-3.so.0 + 593 frame #93: 0x00007fff0bc037a1 libgtk-3.so.0`___lldb_unnamed_symbol9666$$libgtk-3.so.0 + 17 frame #94: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #95: 0x00007fff0bbc035f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #96: 0x00007fff0bbc172e libgtk-3.so.0`___lldb_unnamed_symbol8883$$libgtk-3.so.0 + 142 frame #97: 0x00007fff0b9890ad libgtk-3.so.0`___lldb_unnamed_symbol2470$$libgtk-3.so.0 + 173 frame #98: 0x00007fff0b9aa0ea libgtk-3.so.0`___lldb_unnamed_symbol2740$$libgtk-3.so.0 + 266 frame #99: 0x00007fff0b9942cb libgtk-3.so.0`___lldb_unnamed_symbol2578$$libgtk-3.so.0 + 315 frame #100: 0x00007fff0baf063a libgtk-3.so.0`gtk_main_do_event + 3898 frame #101: 0x00007fff20dc1694 libgdk-3.so.0`___lldb_unnamed_symbol1553$$libgdk-3.so.0 + 100 frame #102: 0x00007fff20db3f52 libgdk-3.so.0`___lldb_unnamed_symbol1402$$libgdk-3.so.0 + 498 frame #103: 0x00007fff20db393f libgdk-3.so.0`___lldb_unnamed_symbol1400$$libgdk-3.so.0 + 415 frame #104: 0x00007fff20db3b0d libgdk-3.so.0`___lldb_unnamed_symbol1401$$libgdk-3.so.0 + 301 frame #105: 0x00007fff20ccda5a libgobject-2.0.so.0`g_signal_emit_valist + 4426 frame #106: 0x00007fff20cce700 libgobject-2.0.so.0`g_signal_emit + 144 frame #107: 0x00007fff20dbd8b0 libgdk-3.so.0`___lldb_unnamed_symbol1503$$libgdk-3.so.0 + 1232 frame #108: 0x00007fff20dcc13c libgdk-3.so.0`___lldb_unnamed_symbol1628$$libgdk-3.so.0 + 44 frame #109: 0x00007fff7ce143c4 libglib-2.0.so.0`___lldb_unnamed_symbol335$$libglib-2.0.so.0 + 20 frame #110: 0x00007fff7ce14bb0 libglib-2.0.so.0`g_main_context_dispatch + 336 frame #111: 0x00007fff7ce16b11 libglib-2.0.so.0`___lldb_unnamed_symbol349$$libglib-2.0.so.0 + 545 frame #112: 0x00007fff7ce16b51 libglib-2.0.so.0`g_main_context_iteration + 49 frame #113: 0x00007fff0bae9dc7 libgtk-3.so.0`gtk_main_iteration + 23 frame #114: 0x00007fff800d604f frame #115: 0x00007fff7f0650a0 frame #116: 0x00007ffff7246d7b libcoreclr.so`___lldb_unnamed_symbol6437$$libcoreclr.so + 124 frame #117: 0x00007ffff7156faa libcoreclr.so`___lldb_unnamed_symbol3544$$libcoreclr.so + 1210 frame #118: 0x00007ffff7162e21 libcoreclr.so`___lldb_unnamed_symbol3705$$libcoreclr.so + 417 frame #119: 0x00007ffff7123c13 libcoreclr.so`___lldb_unnamed_symbol2890$$libcoreclr.so + 451 frame #120: 0x00007ffff71243b0 libcoreclr.so`___lldb_unnamed_symbol2891$$libcoreclr.so + 64 frame #121: 0x00007ffff716307b libcoreclr.so`___lldb_unnamed_symbol3706$$libcoreclr.so + 363 frame #122: 0x00007ffff74ff062 libcoreclr.so`___lldb_unnamed_symbol14907$$libcoreclr.so + 402 frame #123: 0x00007ffff7f5257f libpthread.so.0`start_thread + 239 frame #124: 0x00007ffff7b350e3 libc.so.6`__GI___clone + 67 ```

Please, install debug symbols for libfreetype and libcairo and try that again.

Judging from the stack trace, libfreetype tries to call something in libSkiaSharp, which it shouldn't be doing under any circumstances. The only possible reasons for that I can think of are:

some symbol was incorrectly resolved via dynamic library loader (on Linux imported symbols aren't bound to library names)
Skia somehow registered a callback in libfontconfig and libfreetype tried to execute it

I've checked the libSkiaSharp.so file and it seems to be exporting FT_* symbols it's not supposed to. Filed a bug in SkiaSharp

This should be fixed in Skia.Sharp 1.68.1, When can we expect Avalonia to target a fixed version of Skia.Sharp?

master branch is already using it

@kekekeks at all, has this been merged and pushed out yet? Having the same issue in Manjaro Linux

FreeType symbols should no longer be exported so there might be a different cause. The current release still uses Avalonia's custom build so if possible try current master.

@josegomez are you checking with master or 0.9.x-based build?

I'm using the latest published nuget @kekekeks 0.9.7 The issue may not be this exact one it is happening on the same place I haven't been able to get a good log yet because the seg fault blows away any logging I've put in.

Just replicated this on manjaro linux with Avalonia 0.9.7 Here's the Trace if it Helps

Back Trace and such

``` [jose@jose-vmwarevirtualplatform netcoreapp3.1]$ lldb -- /usr/bin/dotnet SelectDialogTest.dll (lldb) target create "/usr/bin/dotnet" Current executable set to '/usr/bin/dotnet' (x86_64). (lldb) settings set -- target.run-args "SelectDialogTest.dll" (lldb) r Process 12412 launched: '/usr/bin/dotnet' (x86_64) [16:16:18 INF] Button Click Process 12412 stopped * thread #11, name = 'dotnet', stop reason = signal SIGSEGV: address access protected (fault address: 0x7fff7d5c68d0) frame #0: 0x00007fff7d5c68d0 libSkiaSharp.so -> 0x7fff7d5c68d0: shrb $0x0, 0x7fff7d0c(%rsi) 0x7fff7d5c68d7: addb %al, %al 0x7fff7d5c68d9: movl %ecx, 0x7fff(,%rdi,2) 0x7fff7d5c68e0: pushq %rax (lldb) bt * thread #11, name = 'dotnet', stop reason = signal SIGSEGV: address access protected (fault address: 0x7fff7d5c68d0) * frame #0: 0x00007fff7d5c68d0 libSkiaSharp.so frame #1: 0x00007fffef8e09c8 libfreetype.so.6`___lldb_unnamed_symbol117$$libfreetype.so.6 + 344 frame #2: 0x00007fff561957ed libcairo.so.2`___lldb_unnamed_symbol2013$$libcairo.so.2 + 2477 frame #3: 0x00007fff5613deb1 libcairo.so.2`___lldb_unnamed_symbol1100$$libcairo.so.2 + 113 frame #4: 0x00007fff56172a48 libcairo.so.2`___lldb_unnamed_symbol1684$$libcairo.so.2 + 2792 frame #5: 0x00007fff561548c2 libcairo.so.2`___lldb_unnamed_symbol1364$$libcairo.so.2 + 450 frame #6: 0x00007fff56154df7 libcairo.so.2`___lldb_unnamed_symbol1365$$libcairo.so.2 + 183 frame #7: 0x00007fff560fc5c1 libcairo.so.2`___lldb_unnamed_symbol219$$libcairo.so.2 + 129 frame #8: 0x00007fff56177160 libcairo.so.2`___lldb_unnamed_symbol1728$$libcairo.so.2 + 176 frame #9: 0x00007fff5614e6c9 libcairo.so.2`___lldb_unnamed_symbol1308$$libcairo.so.2 + 713 frame #10: 0x00007fff56106082 libcairo.so.2`___lldb_unnamed_symbol475$$libcairo.so.2 + 386 frame #11: 0x00007fff5615b342 libcairo.so.2`cairo_show_glyphs + 34 frame #12: 0x00007fff7c0606e4 libpangocairo-1.0.so.0`___lldb_unnamed_symbol56$$libpangocairo-1.0.so.0 + 660 frame #13: 0x00007fff7c06090d libpangocairo-1.0.so.0`___lldb_unnamed_symbol57$$libpangocairo-1.0.so.0 + 365 frame #14: 0x00007fff7c0a3ed0 libpango-1.0.so.0`pango_renderer_draw_glyph_item + 64 frame #15: 0x00007fff7c0a988a libpango-1.0.so.0`pango_renderer_draw_layout_line + 1098 frame #16: 0x00007fff7c0a9ce8 libpango-1.0.so.0`pango_renderer_draw_layout + 312 frame #17: 0x00007fff7c05cd99 libpangocairo-1.0.so.0`___lldb_unnamed_symbol42$$libpangocairo-1.0.so.0 + 57 frame #18: 0x00007fff554d4951 libgtk-3.so.0`gtk_render_layout + 449 frame #19: 0x00007fff555597f2 libgtk-3.so.0`___lldb_unnamed_symbol6227$$libgtk-3.so.0 + 338 frame #20: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #21: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #22: 0x00007fff555502e1 libgtk-3.so.0`___lldb_unnamed_symbol6118$$libgtk-3.so.0 + 17 frame #23: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #24: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #25: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #26: 0x00007fff55657fed libgtk-3.so.0`___lldb_unnamed_symbol9673$$libgtk-3.so.0 + 29 frame #27: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #28: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #29: 0x00007fff556585e1 libgtk-3.so.0`___lldb_unnamed_symbol9689$$libgtk-3.so.0 + 17 frame #30: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #31: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #32: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #33: 0x00007fff555c552d libgtk-3.so.0`___lldb_unnamed_symbol7561$$libgtk-3.so.0 + 45 frame #34: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #35: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #36: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #37: 0x00007fff554ce029 libgtk-3.so.0`___lldb_unnamed_symbol4567$$libgtk-3.so.0 + 57 frame #38: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #39: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #40: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #41: 0x00007fff5554a81d libgtk-3.so.0`___lldb_unnamed_symbol6029$$libgtk-3.so.0 + 29 frame #42: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #43: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #44: 0x00007fff55547715 libgtk-3.so.0`___lldb_unnamed_symbol6006$$libgtk-3.so.0 + 21 frame #45: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #46: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #47: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #48: 0x00007fff5554620d libgtk-3.so.0`___lldb_unnamed_symbol5968$$libgtk-3.so.0 + 29 frame #49: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #50: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #51: 0x00007fff55547735 libgtk-3.so.0`___lldb_unnamed_symbol6007$$libgtk-3.so.0 + 21 frame #52: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #53: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #54: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #55: 0x00007fff554e4324 libgtk-3.so.0`___lldb_unnamed_symbol4869$$libgtk-3.so.0 + 244 frame #56: 0x00007fff55403fbf libgtk-3.so.0`___lldb_unnamed_symbol2780$$libgtk-3.so.0 + 239 frame #57: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #58: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #59: 0x00007fff55403ec0 libgtk-3.so.0`___lldb_unnamed_symbol2779$$libgtk-3.so.0 + 64 frame #60: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #61: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #62: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #63: 0x00007fff554bfb30 libgtk-3.so.0`___lldb_unnamed_symbol4464$$libgtk-3.so.0 + 112 frame #64: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #65: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #66: 0x00007fff554ba711 libgtk-3.so.0`___lldb_unnamed_symbol4403$$libgtk-3.so.0 + 17 frame #67: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #68: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #69: 0x00007fff5550e6e3 libgtk-3.so.0`___lldb_unnamed_symbol5334$$libgtk-3.so.0 + 355 frame #70: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #71: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #72: 0x00007fff5550c2d1 libgtk-3.so.0`___lldb_unnamed_symbol5303$$libgtk-3.so.0 + 17 frame #73: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #74: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #75: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #76: 0x00007fff55657fed libgtk-3.so.0`___lldb_unnamed_symbol9673$$libgtk-3.so.0 + 29 frame #77: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #78: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #79: 0x00007fff556585e1 libgtk-3.so.0`___lldb_unnamed_symbol9689$$libgtk-3.so.0 + 17 frame #80: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #81: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #82: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #83: 0x00007fff55657fed libgtk-3.so.0`___lldb_unnamed_symbol9673$$libgtk-3.so.0 + 29 frame #84: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #85: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #86: 0x00007fff556585e1 libgtk-3.so.0`___lldb_unnamed_symbol9689$$libgtk-3.so.0 + 17 frame #87: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #88: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #89: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #90: 0x00007fff55657fed libgtk-3.so.0`___lldb_unnamed_symbol9673$$libgtk-3.so.0 + 29 frame #91: 0x00007fff5560569d libgtk-3.so.0`___lldb_unnamed_symbol8610$$libgtk-3.so.0 + 29 frame #92: 0x00007fff5560fb01 libgtk-3.so.0`___lldb_unnamed_symbol8781$$libgtk-3.so.0 + 593 frame #93: 0x00007fff556585e1 libgtk-3.so.0`___lldb_unnamed_symbol9689$$libgtk-3.so.0 + 17 frame #94: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #95: 0x00007fff5561511f libgtk-3.so.0`gtk_container_propagate_draw + 495 frame #96: 0x00007fff556164ee libgtk-3.so.0`___lldb_unnamed_symbol8906$$libgtk-3.so.0 + 142 frame #97: 0x00007fff553de06d libgtk-3.so.0`___lldb_unnamed_symbol2497$$libgtk-3.so.0 + 173 frame #98: 0x00007fff553fc34a libgtk-3.so.0`___lldb_unnamed_symbol2732$$libgtk-3.so.0 + 266 frame #99: 0x00007fff553e731b libgtk-3.so.0`___lldb_unnamed_symbol2579$$libgtk-3.so.0 + 315 frame #100: 0x00007fff55544397 libgtk-3.so.0`gtk_main_do_event + 3799 frame #101: 0x00007fff7c1d3234 libgdk-3.so.0`___lldb_unnamed_symbol1559$$libgdk-3.so.0 + 100 frame #102: 0x00007fff7c1c5a52 libgdk-3.so.0`___lldb_unnamed_symbol1407$$libgdk-3.so.0 + 498 frame #103: 0x00007fff7c1c543f libgdk-3.so.0`___lldb_unnamed_symbol1405$$libgdk-3.so.0 + 415 frame #104: 0x00007fff7c1c560d libgdk-3.so.0`___lldb_unnamed_symbol1406$$libgdk-3.so.0 + 301 frame #105: 0x00007fff7c1020a0 libgobject-2.0.so.0`g_signal_emit_valist + 4800 frame #106: 0x00007fff7c1036b0 libgobject-2.0.so.0`g_signal_emit + 144 frame #107: 0x00007fff7c1cf3a0 libgdk-3.so.0`___lldb_unnamed_symbol1508$$libgdk-3.so.0 + 1232 frame #108: 0x00007fff7c1ddcec libgdk-3.so.0`___lldb_unnamed_symbol1634$$libgdk-3.so.0 + 44 frame #109: 0x00007fffef6ce684 libglib-2.0.so.0`___lldb_unnamed_symbol315$$libglib-2.0.so.0 + 20 frame #110: 0x00007fffef6d388f libglib-2.0.so.0`g_main_context_dispatch + 335 frame #111: 0x00007fffef6d5831 libglib-2.0.so.0`___lldb_unnamed_symbol354$$libglib-2.0.so.0 + 545 frame #112: 0x00007fffef6d5871 libglib-2.0.so.0`g_main_context_iteration + 49 frame #113: 0x00007fff5553dad7 libgtk-3.so.0`gtk_main_iteration + 23 frame #114: 0x00007fff8055567b frame #115: 0x00007fff7db26382 frame #116: 0x00007fff7db2d651 frame #117: 0x00007fff7db2649e frame #118: 0x00007ffff746750b libcoreclr.so`___lldb_unnamed_symbol6356$$libcoreclr.so + 124 frame #119: 0x00007ffff7387010 libcoreclr.so`___lldb_unnamed_symbol3567$$libcoreclr.so + 1648 frame #120: 0x00007ffff73923e9 libcoreclr.so`___lldb_unnamed_symbol3721$$libcoreclr.so + 441 frame #121: 0x00007ffff735292c libcoreclr.so`___lldb_unnamed_symbol2921$$libcoreclr.so + 332 frame #122: 0x00007ffff7352f9d libcoreclr.so`___lldb_unnamed_symbol2922$$libcoreclr.so + 45 frame #123: 0x00007ffff739266e libcoreclr.so`___lldb_unnamed_symbol3722$$libcoreclr.so + 382 frame #124: 0x00007ffff76e3a8f libcoreclr.so`___lldb_unnamed_symbol14149$$libcoreclr.so + 447 frame #125: 0x00007ffff7f7e46f libpthread.so.0`start_thread + 223 frame #126: 0x00007ffff7ca63d3 libc.so.6`__GI___clone + 67 (lldb) ```

I have the same issue. Avalonia 0.9.12

$ dotnet --info 
Пакет SDK для .NET Core:
 Version:   3.1.108
 Commit:    c423b556b5

Среда выполнения:
 OS Name:     arch
 OS Version:  
 OS Platform: Linux
 RID:         arch-x64
 Base Path:   /usr/share/dotnet/sdk/3.1.108/

Host (useful for support):
  Version: 3.1.8
  Commit:  05a0c8f6b1

.NET Core SDKs installed:
  3.1.108 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.NETCore.App 3.1.8 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

Back Trace

``` $ lldb -- ./AppStepsRecorder (lldb) target create "./AppStepsRecorder" Current executable set to '/home/sergey/projects/AppStepsRecorder/AppStepsRecorder/bin/Debug/netcoreapp3.1/AppStepsRecorder' (x86_64). (lldb) r Process 8547 launched: '/home/sergey/projects/AppStepsRecorder/AppStepsRecorder/bin/Debug/netcoreapp3.1/AppStepsRecorder' (x86_64) Process 8547 stopped * thread #33, name = 'AppStepsRecorde', stop reason = signal SIGSEGV: address access protected (fault address: 0x7fff00fda8d0) frame #0: 0x00007fff00fda8d0 -> 0x7fff00fda8d0: shrb $0xad, %dh 0x7fff00fda8d3: addb %bh, %bh 0x7fff00fda8d5: jg 0x7fff00fda8d7 0x7fff00fda8d7: addb %al, %al (lldb) bt * thread #33, name = 'AppStepsRecorde', stop reason = signal SIGSEGV: address access protected (fault address: 0x7fff00fda8d0) * frame #0: 0x00007fff00fda8d0 frame #1: 0x00007fff543385f8 libfreetype.so.6`___lldb_unnamed_symbol119$$libfreetype.so.6 + 344 frame #2: 0x00007ffef95176bd libcairo.so.2`___lldb_unnamed_symbol1093$$libcairo.so.2 + 2829 frame #3: 0x00007ffef94dee8d libcairo.so.2`___lldb_unnamed_symbol687$$libcairo.so.2 + 109 frame #4: 0x00007ffef95225b3 libcairo.so.2`___lldb_unnamed_symbol1172$$libcairo.so.2 + 2947 frame #5: 0x00007ffef94f1e5c libcairo.so.2`___lldb_unnamed_symbol845$$libcairo.so.2 + 348 frame #6: 0x00007ffef94f2611 libcairo.so.2`___lldb_unnamed_symbol847$$libcairo.so.2 + 209 frame #7: 0x00007ffef94a19c1 libcairo.so.2`___lldb_unnamed_symbol136$$libcairo.so.2 + 129 frame #8: 0x00007ffef9528711 libcairo.so.2`___lldb_unnamed_symbol1223$$libcairo.so.2 + 161 frame #9: 0x00007ffef94f08bd libcairo.so.2`___lldb_unnamed_symbol838$$libcairo.so.2 + 733 frame #10: 0x00007ffef94ab39d libcairo.so.2`___lldb_unnamed_symbol271$$libcairo.so.2 + 429 frame #11: 0x00007ffef94febf2 libcairo.so.2`cairo_show_glyphs + 34 frame #12: 0x00007fff000147b4 libpangocairo-1.0.so.0`___lldb_unnamed_symbol47$$libpangocairo-1.0.so.0 + 820 frame #13: 0x00007fff00014a35 libpangocairo-1.0.so.0`___lldb_unnamed_symbol49$$libpangocairo-1.0.so.0 + 549 frame #14: 0x00007ffef945b8a0 libpango-1.0.so.0`pango_renderer_draw_glyph_item + 64 frame #15: 0x00007ffef9463468 libpango-1.0.so.0`pango_renderer_draw_layout_line + 1224 frame #16: 0x00007ffef9463bc9 libpango-1.0.so.0`pango_renderer_draw_layout + 345 frame #17: 0x00007fff000155c7 libpangocairo-1.0.so.0`pango_cairo_show_layout + 183 frame #18: 0x00007ffef89e19ca libgtk-3.so.0`gtk_render_layout + 554 frame #19: 0x00007ffef894de22 libgtk-3.so.0`___lldb_unnamed_symbol3958$$libgtk-3.so.0 + 338 frame #20: 0x00007ffef888967d libgtk-3.so.0`___lldb_unnamed_symbol1566$$libgtk-3.so.0 + 29 frame #21: 0x00007ffef889538b libgtk-3.so.0`___lldb_unnamed_symbol1745$$libgtk-3.so.0 + 587 frame #22: 0x00007ffef8945481 libgtk-3.so.0`___lldb_unnamed_symbol3888$$libgtk-3.so.0 + 17 frame #23: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #24: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #25: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #26: 0x00007ffef883713d libgtk-3.so.0`___lldb_unnamed_symbol658$$libgtk-3.so.0 + 29 frame #27: 0x00007ffef888967d libgtk-3.so.0`___lldb_unnamed_symbol1566$$libgtk-3.so.0 + 29 frame #28: 0x00007ffef889538b libgtk-3.so.0`___lldb_unnamed_symbol1745$$libgtk-3.so.0 + 587 frame #29: 0x00007ffef8837601 libgtk-3.so.0`___lldb_unnamed_symbol671$$libgtk-3.so.0 + 17 frame #30: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #31: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #32: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #33: 0x00007ffef88dd4fd libgtk-3.so.0`___lldb_unnamed_symbol2692$$libgtk-3.so.0 + 45 frame #34: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #35: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #36: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #37: 0x00007ffef89e3d19 libgtk-3.so.0`___lldb_unnamed_symbol5489$$libgtk-3.so.0 + 57 frame #38: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #39: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #40: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #41: 0x00007ffef895db8d libgtk-3.so.0`___lldb_unnamed_symbol4188$$libgtk-3.so.0 + 29 frame #42: 0x00007ffef888967d libgtk-3.so.0`___lldb_unnamed_symbol1566$$libgtk-3.so.0 + 29 frame #43: 0x00007ffef889538b libgtk-3.so.0`___lldb_unnamed_symbol1745$$libgtk-3.so.0 + 587 frame #44: 0x00007ffef8958ed5 libgtk-3.so.0`___lldb_unnamed_symbol4108$$libgtk-3.so.0 + 21 frame #45: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #46: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #47: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #48: 0x00007ffef895889d libgtk-3.so.0`___lldb_unnamed_symbol4079$$libgtk-3.so.0 + 29 frame #49: 0x00007ffef888967d libgtk-3.so.0`___lldb_unnamed_symbol1566$$libgtk-3.so.0 + 29 frame #50: 0x00007ffef889538b libgtk-3.so.0`___lldb_unnamed_symbol1745$$libgtk-3.so.0 + 587 frame #51: 0x00007ffef8958eb5 libgtk-3.so.0`___lldb_unnamed_symbol4107$$libgtk-3.so.0 + 21 frame #52: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #53: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #54: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #55: 0x00007ffef8ab26ff libgtk-3.so.0`___lldb_unnamed_symbol7162$$libgtk-3.so.0 + 239 frame #56: 0x00007ffef888967d libgtk-3.so.0`___lldb_unnamed_symbol1566$$libgtk-3.so.0 + 29 frame #57: 0x00007ffef889538b libgtk-3.so.0`___lldb_unnamed_symbol1745$$libgtk-3.so.0 + 587 frame #58: 0x00007ffef8ab2750 libgtk-3.so.0`___lldb_unnamed_symbol7163$$libgtk-3.so.0 + 64 frame #59: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #60: 0x00007ffef8888d31 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libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #94: 0x00007ffef8888d31 libgtk-3.so.0`gtk_container_propagate_draw + 577 frame #95: 0x00007ffef8888e3e libgtk-3.so.0`___lldb_unnamed_symbol1548$$libgtk-3.so.0 + 142 frame #96: 0x00007ffef8add27c libgtk-3.so.0`___lldb_unnamed_symbol7427$$libgtk-3.so.0 + 380 frame #97: 0x00007ffef8abd79a libgtk-3.so.0`___lldb_unnamed_symbol7220$$libgtk-3.so.0 + 266 frame #98: 0x00007ffef8acb20b libgtk-3.so.0`___lldb_unnamed_symbol7321$$libgtk-3.so.0 + 315 frame #99: 0x00007ffef8965e39 libgtk-3.so.0`gtk_main_do_event + 3753 frame #100: 0x00007fff000a8413 libgdk-3.so.0`___lldb_unnamed_symbol175$$libgdk-3.so.0 + 99 frame #101: 0x00007fff000b1152 libgdk-3.so.0`___lldb_unnamed_symbol241$$libgdk-3.so.0 + 498 frame #102: 0x00007fff000b60fb libgdk-3.so.0`___lldb_unnamed_symbol258$$libgdk-3.so.0 + 347 frame #103: 0x00007fff000b62f9 libgdk-3.so.0`___lldb_unnamed_symbol259$$libgdk-3.so.0 + 265 frame #104: 0x00007ffef95d298a libgobject-2.0.so.0`g_signal_emit_valist + 4730 frame #105: 0x00007ffef95d2b00 libgobject-2.0.so.0`g_signal_emit + 144 frame #106: 0x00007fff000ac170 libgdk-3.so.0`___lldb_unnamed_symbol193$$libgdk-3.so.0 + 1152 frame #107: 0x00007fff000998ac libgdk-3.so.0`___lldb_unnamed_symbol66$$libgdk-3.so.0 + 44 frame #108: 0x00007fff5414e134 libglib-2.0.so.0`___lldb_unnamed_symbol179$$libglib-2.0.so.0 + 20 frame #109: 0x00007fff5414d8f4 libglib-2.0.so.0`g_main_context_dispatch + 388 frame #110: 0x00007fff541a1821 libglib-2.0.so.0`___lldb_unnamed_symbol458$$libglib-2.0.so.0 + 737 frame #111: 0x00007fff5414c121 libglib-2.0.so.0`g_main_context_iteration + 49 frame #112: 0x00007ffef89632c7 libgtk-3.so.0`gtk_main_iteration + 23 frame #113: 0x00007fff803f10fb frame #114: 0x00007fff7db56642 frame #115: 0x00007fff803d54dd frame #116: 0x00007fff7db5675e frame #117: 0x00007ffff747db7b libcoreclr.so`___lldb_unnamed_symbol6386$$libcoreclr.so + 124 frame #118: 0x00007ffff73a1a9e libcoreclr.so`___lldb_unnamed_symbol3592$$libcoreclr.so + 1534 frame #119: 0x00007ffff73ac9b9 libcoreclr.so`___lldb_unnamed_symbol3746$$libcoreclr.so + 441 frame #120: 0x00007ffff736e5fc libcoreclr.so`___lldb_unnamed_symbol2946$$libcoreclr.so + 332 frame #121: 0x00007ffff736ec5d libcoreclr.so`___lldb_unnamed_symbol2947$$libcoreclr.so + 45 frame #122: 0x00007ffff73acc3e libcoreclr.so`___lldb_unnamed_symbol3747$$libcoreclr.so + 382 frame #123: 0x00007ffff76e510c libcoreclr.so`___lldb_unnamed_symbol14180$$libcoreclr.so + 428 frame #124: 0x00007ffff7f853e9 libpthread.so.0`start_thread + 233 frame #125: 0x00007ffff7cb6293 libc.so.6`__clone + 67 ```

Workaround for 0.9.x:

<ItemGroup>
    <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="1.68.3" />
    <PackageReference Include="Avalonia.Skia.Linux.Natives" Version="1.68.0.2" ExcludeAssets="all" />
    <PackageReference Include="SkiaSharp" Version="1.68.3" />
</ItemGroup>

Duplicate of https://github.com/AvaloniaUI/Avalonia/issues/4325

AvaloniaUI / Avalonia

OpenFileDialog.ShowAsync segfaults on Linux #2817