Lightmap GI headless segfault #94008

unfa · 2024-07-06T20:18:54Z

Tested versions

Reproducible in 4.2.2 stable and v4.3.beta.custom_build.b97110cd3 (2024-07-05 14:38:10 UTC)

System information

Arch Linux + X11 + Radeon RX6800XT

Issue description

When the game is run with --headless --dedicated parameters Godot crashes seemingly as it's loading or spawning a game level.

--dedicated itself works fine, --headless also but combined they trigger the crash.

I've used prints to find out what exact line is executed when the crash happens and it's attaching the loaded and instantiated map scene to the scene tree:

@rpc("authority", "reliable", "call_remote")
func load_map():
	Logger.log(["Loading map packed scene from   ", game_config.map_scene_path], Logger.MessageType.INFO)
	if is_instance_valid(map): # refuse to load a map twice
		print("Map file already loaded, continuing")
		return

	print("1")
	var time_msec = Time.get_ticks_msec()
	print("2")
	var map_scene = load(game_config.map_scene_path)
	print("3")
	var map_instance = map_scene.instantiate()
	print("4")
	assert(map_instance is Map, "Game State loaded a map that is of type " + str(map_instance))
	print("5")
	map_instance.name = "Map"
	print("6")
	add_child(map_instance)
	print("7")
	map_instance.global_position = spatial_origin_position
	print("8")
	map = map_instance
	print("9")
	time_msec = Time.get_ticks_msec() - time_msec
	print("10")
	Logger.log(["Map loaded and spawned in", time_msec, "msec"], Logger.MessageType.SUCCESS)
	await get_tree().create_timer(REFLECTION_PROBE_RENDERING_TIMEOUT).timeout
	map_ready.emit()
	%LoadingScreen.hide()

Output:

Godot Engine v4.3.beta.custom_build.b97110cd3 (2024-07-05 14:38:10 UTC) - https://godotengine.org

Panku:<CanvasLayer#65531807086>
LynxWindowsManager:<Control#65598915955>
Booting Liblast
Found commandline arguments: ["--dedicated"]
[color=c71585]· SERVER Starting dedicated server
[color=c71585]· SERVER No map requested, using default: res://data/game/maps/city.tscn 
[color=c71585]✅ SERVER Server created
[color=c71585]ℹ SERVER Loading map packed scene from res://data/game/maps/city.tscn 
1
2
3
4
5
6

================================================================
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v4.3.beta.custom_build (b97110cd307e4d78e20bfafe5de6c082194b2cd6)
Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] /usr/lib/libc.so.6(+0x3cae0) [0x7a40b774eae0] (??:0)
[2] ./godot.linuxbsd.editor.x86_64(+0x465b8a1) [0x623f35a738a1] (/godot-git/./core/templates/hash_set.h:170)
[3] ./godot.linuxbsd.editor.x86_64(+0x46359ec) [0x623f35a4d9ec] (/godot-git/servers/rendering/renderer_scene_cull.cpp:1476)
[4] ./godot.linuxbsd.editor.x86_64(+0x302eb0f) [0x623f34446b0f] (/godot-git/./core/object/ref_counted.h:105)
[5] ./godot.linuxbsd.editor.x86_64(+0x4f84c00) [0x623f3639cc00] (/godot-git/core/object/object.cpp:873)
[6] ./godot.linuxbsd.editor.x86_64(+0x2a228f8) [0x623f33e3a8f8] (/godot-git/scene/main/node.cpp:264)
[7] ./godot.linuxbsd.editor.x86_64(+0x2a228d2) [0x623f33e3a8d2] (/godot-git/./core/templates/hash_map.h:456)
[8] ./godot.linuxbsd.editor.x86_64(+0x2a266f7) [0x623f33e3e6f7] (/godot-git/scene/main/node.cpp:3168)
[9] ./godot.linuxbsd.editor.x86_64(+0x2a3a636) [0x623f33e52636] (/godot-git/scene/main/node.cpp:1550)
[10] ./godot.linuxbsd.editor.x86_64(+0x2a5b804) [0x623f33e73804] (/godot-git/./core/variant/binder_common.h:304 (discriminator 3))
[11] ./godot.linuxbsd.editor.x86_64(+0xa5c994) [0x623f31e74994] (/godot-git/./core/variant/variant.h:308)
[12] ./godot.linuxbsd.editor.x86_64(+0x901324) [0x623f31d19324] (/godot-git/modules/gdscript/gdscript.cpp:2028 (discriminator 1))
[13] ./godot.linuxbsd.editor.x86_64(+0x4f85bac) [0x623f3639dbac] (/godot-git/core/object/object.cpp:786)
[14] ./godot.linuxbsd.editor.x86_64(+0x4ce7eaa) [0x623f360ffeaa] (/godot-git/core/variant/variant_call.cpp:1211 (discriminator 2))
[15] ./godot.linuxbsd.editor.x86_64(+0xa6e259) [0x623f31e86259] (/godot-git/./core/variant/variant.h:308)
[16] ./godot.linuxbsd.editor.x86_64(+0x901324) [0x623f31d19324] (/godot-git/modules/gdscript/gdscript.cpp:2028 (discriminator 1))
[17] ./godot.linuxbsd.editor.x86_64(+0x4f85bac) [0x623f3639dbac] (/godot-git/core/object/object.cpp:786)
[18] ./godot.linuxbsd.editor.x86_64(+0x4ce7eaa) [0x623f360ffeaa] (/godot-git/core/variant/variant_call.cpp:1211 (discriminator 2))
[19] ./godot.linuxbsd.editor.x86_64(+0xa6e259) [0x623f31e86259] (/godot-git/./core/variant/variant.h:308)
[20] ./godot.linuxbsd.editor.x86_64(+0x901324) [0x623f31d19324] (/godot-git/modules/gdscript/gdscript.cpp:2028 (discriminator 1))
[21] ./godot.linuxbsd.editor.x86_64(+0x4f85bac) [0x623f3639dbac] (/godot-git/core/object/object.cpp:786)
[22] ./godot.linuxbsd.editor.x86_64(+0x4ce7eaa) [0x623f360ffeaa] (/godot-git/core/variant/variant_call.cpp:1211 (discriminator 2))
[23] ./godot.linuxbsd.editor.x86_64(+0xa6e259) [0x623f31e86259] (/godot-git/./core/variant/variant.h:308)
[24] ./godot.linuxbsd.editor.x86_64(+0x901324) [0x623f31d19324] (/godot-git/modules/gdscript/gdscript.cpp:2028 (discriminator 1))
[25] ./godot.linuxbsd.editor.x86_64(+0x2a3616b) [0x623f33e4e16b] (/godot-git/./core/variant/variant.h:308)
[26] ./godot.linuxbsd.editor.x86_64(+0x4f84c00) [0x623f3639cc00] (/godot-git/core/object/object.cpp:873)
[27] ./godot.linuxbsd.editor.x86_64(+0x2a22938) [0x623f33e3a938] (/godot-git/scene/main/node.cpp:267 (discriminator 1))
[28] ./godot.linuxbsd.editor.x86_64(+0x2a266f7) [0x623f33e3e6f7] (/godot-git/scene/main/node.cpp:3168)
[29] ./godot.linuxbsd.editor.x86_64(+0x2a3a636) [0x623f33e52636] (/godot-git/scene/main/node.cpp:1550)
[30] ./godot.linuxbsd.editor.x86_64(+0x2a752e1) [0x623f33e8d2e1] (/godot-git/scene/main/scene_tree.cpp:1416)
[31] ./godot.linuxbsd.editor.x86_64(+0x2a7f518) [0x623f33e97518] (/godot-git/scene/main/scene_tree.cpp:535)
[32] ./godot.linuxbsd.editor.x86_64(+0x6a4a57) [0x623f31abca57] (/godot-git/main/main.cpp:4107)
[33] ./godot.linuxbsd.editor.x86_64(+0x60f881) [0x623f31a27881] (/godot-git/platform/linuxbsd/os_linuxbsd.cpp:962 (discriminator 1))
[34] ./godot.linuxbsd.editor.x86_64(+0x5e79a2) [0x623f319ff9a2] (/godot-git/platform/linuxbsd/godot_linuxbsd.cpp:85)
[35] /usr/lib/libc.so.6(+0x25c88) [0x7a40b7737c88] (??:0)
[36] /usr/lib/libc.so.6(__libc_start_main+0x8c) [0x7a40b7737d4c] (??:0)
[37] ./godot.linuxbsd.editor.x86_64(+0x60ce75) [0x623f31a24e75] (??:?)
-- END OF BACKTRACE --
================================================================

Steps to reproduce

make sure you have git-lfs installed
git clone git@codeberg.org:Liblast/Liblast.git
cd ./Liblast/src/game
Open the project in Godot 4.2 or later: godot --editor
After the import completes, run the project like this godot --headless --dedicated

Minimal reproduction project (MRP)

So far I can't produce one.

EDIT (2024-08-03):
headless-lightmap-gi-crash.zip

Video demonstration on how to use this:
https://youtu.be/2PtDuEWL2P4

The text was updated successfully, but these errors were encountered:

unfa · 2024-07-08T12:51:31Z

BTW, I also filed this issue in Liblast's issue tracker on Codeberg:
https://codeberg.org/Liblast/Liblast/issues/11

unfa · 2024-08-03T17:01:13Z

BTW, this is still reproducible in 4.3 RC2:

Booting Liblast
Found commandline arguments: ["--dedicated"]
[color=c71585]· SERVER Starting dedicated server
[color=c71585]· SERVER No map requested, using default: res://data/game/maps/city.tscn 
[color=c71585]✅ SERVER Server created
[color=c71585]ℹ SERVER Loading map packed scene from res://data/game/maps/city.tscn 

================================================================
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v4.3.rc2.official (3978628c6cc1227250fc6ed45c8d854d24c30c30)
Dumping the backtrace. Please include this when reporting the bug to the project developer.
[1] /usr/lib/libc.so.6(+0x3d1d0) [0x7f5635ca01d0] (??:0)
[2] ./Godot_v4.3-rc2_linux.x86_64() [0x3ba58b1] (??:0)
[3] ./Godot_v4.3-rc2_linux.x86_64() [0x3ba67d4] (??:0)
[4] ./Godot_v4.3-rc2_linux.x86_64() [0x289a4e4] (??:0)
[5] ./Godot_v4.3-rc2_linux.x86_64() [0x42a7818] (??:0)
[6] ./Godot_v4.3-rc2_linux.x86_64() [0x22d6a8a] (??:0)
[7] ./Godot_v4.3-rc2_linux.x86_64() [0x22d6a64] (??:0)
[8] ./Godot_v4.3-rc2_linux.x86_64() [0x232ddbf] (??:0)
[9] ./Godot_v4.3-rc2_linux.x86_64() [0x232e247] (??:0)
[10] ./Godot_v4.3-rc2_linux.x86_64() [0x2388e7a] (??:0)
[11] ./Godot_v4.3-rc2_linux.x86_64() [0x7c81cd] (??:0)
[12] ./Godot_v4.3-rc2_linux.x86_64() [0x687a2c] (??:0)
[13] ./Godot_v4.3-rc2_linux.x86_64() [0x42c8a1f] (??:0)
[14] ./Godot_v4.3-rc2_linux.x86_64() [0x4113f7f] (??:0)
[15] ./Godot_v4.3-rc2_linux.x86_64() [0x7d87ae] (??:0)
[16] ./Godot_v4.3-rc2_linux.x86_64() [0x687a2c] (??:0)
[17] ./Godot_v4.3-rc2_linux.x86_64() [0x42c8a1f] (??:0)
[18] ./Godot_v4.3-rc2_linux.x86_64() [0x4113f7f] (??:0)
[19] ./Godot_v4.3-rc2_linux.x86_64() [0x7d87ae] (??:0)
[20] ./Godot_v4.3-rc2_linux.x86_64() [0x687a2c] (??:0)
[21] ./Godot_v4.3-rc2_linux.x86_64() [0x42c8a1f] (??:0)
[22] ./Godot_v4.3-rc2_linux.x86_64() [0x4113f7f] (??:0)
[23] ./Godot_v4.3-rc2_linux.x86_64() [0x7d87ae] (??:0)
[24] ./Godot_v4.3-rc2_linux.x86_64() [0x687a2c] (??:0)
[25] ./Godot_v4.3-rc2_linux.x86_64() [0x234935f] (??:0)
[26] ./Godot_v4.3-rc2_linux.x86_64() [0x42a7818] (??:0)
[27] ./Godot_v4.3-rc2_linux.x86_64() [0x22d6ab8] (??:0)
[28] ./Godot_v4.3-rc2_linux.x86_64() [0x232ddbf] (??:0)
[29] ./Godot_v4.3-rc2_linux.x86_64() [0x232e247] (??:0)
[30] ./Godot_v4.3-rc2_linux.x86_64() [0x23b8012] (??:0)
[31] ./Godot_v4.3-rc2_linux.x86_64() [0x527c34] (??:0)
[32] ./Godot_v4.3-rc2_linux.x86_64() [0x4202a2] (??:0)
[33] /usr/lib/libc.so.6(+0x25e08) [0x7f5635c88e08] (??:0)
[34] /usr/lib/libc.so.6(__libc_start_main+0x8c) [0x7f5635c88ecc] (??:0)
[35] ./Godot_v4.3-rc2_linux.x86_64() [0x43d44a] (??:0)
-- END OF BACKTRACE --
================================================================
fish: Job 1, './Godot_v4.3-rc2_linux.x86_64 -…' terminated by signal SIGABRT (Abort)

unfa · 2024-08-03T17:11:16Z

I've done some testing and it seems that the crash is related to LightmapGI.
After removing LightmapGI node from the spawned sceene - the crash does not happen.

unfa · 2024-08-03T18:41:37Z

I have updated the initial post and added a link to MRP and a video demonstration on how it works:

headless-lightmap-gi-crash.zip

https://youtu.be/2PtDuEWL2P4

clayjohn · 2024-08-03T18:48:11Z

Sounds like it might be a duplicate of #89119

unfa · 2024-08-03T18:55:29Z

It does seem so, maybe my MRP will be useful in fixing this?
It seems to only happen when you add an instantiated scene to the tree.

jamie-pate · 2024-08-03T19:11:03Z

With this build: #95103

$ ./bin/godot.linuxbsd.editor.x86_64 --path ~/build/src/godot-repros/lightmap-headless/headless-lightmap-gi-crash/ --headless
Godot Engine v4.3.rc.custom_build.3978628c6 (2024-07-31 22:06:47 UTC) - https://godotengine.org

Did not crash

Calinou · 2024-08-08T00:18:22Z

Closing per @jamie-pate's comment.

unfa · 2024-08-08T20:43:23Z

With this build: #95103

$ ./bin/godot.linuxbsd.editor.x86_64 --path ~/build/src/godot-repros/lightmap-headless/headless-lightmap-gi-crash/ --headless
Godot Engine v4.3.rc.custom_build.3978628c6 (2024-07-31 22:06:47 UTC) - https://godotengine.org

Did not crash

Great news! It'd be great to see this fix make it to 4.3 stable. If not - I guess I can make a custom build for the dedicated servers for now.,,

akien-mga · 2024-08-08T20:51:47Z

Well this fix is in 4.3.rc3.

unfa changed the title ~~Mysterious Crash~~ Crash when adding a scene to scene tree Jul 6, 2024

Mickeon added platform:linuxbsd needs testing crash labels Jul 6, 2024

unfa changed the title ~~Crash when adding a scene to scene tree~~ Seqfault when adding a scene to scene tree (only in headless mode) Jul 11, 2024

unfa changed the title ~~Seqfault when adding a scene to scene tree (only in headless mode)~~ Segfault when adding a scene to scene tree (only in headless mode) Jul 11, 2024

unfa changed the title ~~Segfault when adding a scene to scene tree (only in headless mode)~~ Segfault when adding a scene with LightmapGI to scene tree (only in headless mode) Aug 3, 2024

unfa changed the title ~~Segfault when adding a scene with LightmapGI to scene tree (only in headless mode)~~ Lightmap GI headless segfault Aug 3, 2024

Calinou closed this as completed Aug 8, 2024

Calinou added bug archived topic:rendering and removed needs testing labels Aug 8, 2024

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Lightmap GI headless segfault #94008

Lightmap GI headless segfault #94008

unfa commented Jul 6, 2024 •

edited

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unfa commented Jul 8, 2024

unfa commented Aug 3, 2024

unfa commented Aug 3, 2024

unfa commented Aug 3, 2024

clayjohn commented Aug 3, 2024

unfa commented Aug 3, 2024

jamie-pate commented Aug 3, 2024

Calinou commented Aug 8, 2024

unfa commented Aug 8, 2024

akien-mga commented Aug 8, 2024

Lightmap GI headless segfault #94008

Lightmap GI headless segfault #94008

Comments

unfa commented Jul 6, 2024 • edited Loading

Tested versions

System information

Issue description

Steps to reproduce

Minimal reproduction project (MRP)

unfa commented Jul 8, 2024

unfa commented Aug 3, 2024

unfa commented Aug 3, 2024

unfa commented Aug 3, 2024

clayjohn commented Aug 3, 2024

unfa commented Aug 3, 2024

jamie-pate commented Aug 3, 2024

Calinou commented Aug 8, 2024

unfa commented Aug 8, 2024

akien-mga commented Aug 8, 2024

unfa commented Jul 6, 2024 •

edited

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