Internal Script Error! - opcode #24 (report please).

[aypm-dev]

Godot version

v3.3.4.stable.official

System information

Windows 10, GLES3, Intel HD Graphics 2500

Issue description

Godot rarely prints the error: "Internal Script Error! - opcode #24 (report please)." and crashes the game, when you create a timer using yield(get_tree()) in a function and then recalling the function inside itself.

I call the function inside itself to make an infinity loop. Now I know that it crashes, so I replace it with a while(true) loop.
I couldn't find the same error at GitHub so I'm reporting it.

Steps to reproduce

This is my function, it seems to crash, I hope it isn't only in my project, but looks like yield(get_tree().create_timer(1), "timeout") has been causing similar errors. #42379 or #45224

func Idling():
	var cooldown= 13
	cooldown+= rand_range(-2, 6)
	yield(get_tree().create_timer(cooldown), "timeout")
	yield($Sprite, "animation_finished")
	$Sprite.animation = "Idling" 
	Idling()

I replaced the function with a while loop and nothing seems to append since.

func Idling():
	while(true):
		var cooldown = 13
		cooldown += rand_range(-2, 6)
		yield(get_tree().create_timer(cooldown), "timeout")
		yield($Sprite, "animation_finished")
		$Sprite.animation = "Idling" 

"HOW TO:"
Create a script with this code inside:
"it crashes my game without the message, but It should work"

func _ready():
        Function()

func Function():
	yield(get_tree().create_timer(5), "timeout")
        Fuction()

Minimal reproduction project

No response

[Calinou]

In general, I'd expect infinite chains of yield() to crash as they aren't designed to handle this scenario.

[aypm-dev]

It happened again, this time is "Internal Script Error! - opcode #28 (report please).", but with the while(true) loop.

Oh, and this is in the debug menu:

" (Sorry, if it's in Spanish xd)
E 0:03:04.330 _get_variant: Bad code! (unknown addressing mode).
<Error de C++>Method failed. Returning: __null
<Fuente C++> modules/gdscript/gdscript_function.cpp:130 @ _get_variant()
NPC.gd:84 @ ()
"

I'm changing to timer nodes haha.

[cesarizu]

The same thing is happening for me without any loop, only when running from the editor. When running from the command line it doesn't happen:

func _ready():
	animation_player.play("first")
	# Some code
	yield(animation_player, "animation_finished")
	animation_player.queue("second")
	# Some more code

Backtrace:

================================================================
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v3.4.1.rc1.official (7b0801c7fb4416625fb9ca124b41b93677689420)
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] /lib64/libc.so.6(+0x56430) [0x7ff996577430] (??:0)
[2] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0xa9c2d7] (??:0)
[3] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0xabe3ac] (??:0)
[4] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0xabefd4] (??:0)
[5] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0xa75630] (??:0)
[6] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x2b65d99] (??:0)
[7] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x2b6618d] (??:0)
[8] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x2b66e6c] (??:0)
[9] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x22cedc8] (??:0)
[10] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x22cf980] (??:0)
[11] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x1d86d76] (??:0)
[12] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x1d9c74c] (??:0)
[13] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x9d6441] (??:0)
[14] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x94534d] (??:0)
[15] /lib64/libc.so.6(+0x405c0) [0x7ff9965615c0] (??:0)
[16] /lib64/libc.so.6(__libc_start_main+0x7e) [0x7ff99656167c] (??:0)
[17] /home/cesar/opt/godot/Godot_v3.4.1-rc1_x11.64() [0x95901e] (??:0)
-- END OF BACKTRACE --
================================================================

[cesarizu]

I just realized that that backtrace is not very useful. This one is from a 3.5 build from sources:

================================================================
handle_crash: Program crashed with signal 11
Engine version: Godot Engine v3.5.beta.custom_build (c42e9bd5890e90f0d0ae1690cb445dc2597d9470)
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] /lib64/libc.so.6(+0x56430) [0x7fae008bb430] (??:0)
[2] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x8ac2b4] (/home/cesar/src/external/godot/godot3/modules/gdscript/gdscript_function.cpp:428)
[3] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x8d5190] (/home/cesar/src/external/godot/godot3/modules/gdscript/gdscript_function.cpp:1816)
[4] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x8d5fcd] (/home/cesar/src/external/godot/godot3/./core/reference.h:257)
[5] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x8d7ee0] (/home/cesar/src/external/godot/godot3/./core/method_bind.h:334 (discriminator 4))
[6] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x2f0c2bc] (/home/cesar/src/external/godot/godot3/core/object.cpp:918 (discriminator 1))
[7] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x2f16c11] (/home/cesar/src/external/godot/godot3/./core/variant.h:437)
[8] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x2f17dbc] (/home/cesar/src/external/godot/godot3/core/object.cpp:1280)
[9] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x256ccb5] (/home/cesar/src/external/godot/godot3/./core/variant.h:437)
[10] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x2f09c74] (/home/cesar/src/external/godot/godot3/core/object.cpp:929)
[11] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x1f6c582] (/home/cesar/src/external/godot/godot3/scene/main/scene_tree.cpp:994)
[12] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x1f7692e] (/home/cesar/src/external/godot/godot3/scene/main/scene_tree.cpp:488 (discriminator 2))
[13] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x7be66b] (/home/cesar/src/external/godot/godot3/main/main.cpp:2207)
[14] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x7a2b11] (/home/cesar/src/external/godot/godot3/platform/x11/os_x11.cpp:3705)
[15] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x78b9b5] (/home/cesar/src/external/godot/godot3/platform/x11/godot_x11.cpp:55)
[16] /lib64/libc.so.6(+0x405c0) [0x7fae008a55c0] (??:0)
[17] /lib64/libc.so.6(__libc_start_main+0x7e) [0x7fae008a567c] (??:0)
[18] /home/cesar/src/external/godot/godot3/bin/godot.x11.opt.tools.64() [0x790d25] (/home/abuild/rpmbuild/BUILD/glibc-2.34/csu/../sysdeps/x86_64/start.S:118)
-- END OF BACKTRACE --
================================================================

[cesarizu]

So it seems for me the error is caused by enabling "Save on focus loss" on the editor settings. This causes the project to be saved once launched and then it crashes. That explains why running from the command line didn't crash the game either.

[saletrak]

Happens to me in Godot 4.1, when saving script while game is lunched.