Crash, when using set_script and emit_signal on AnimatedSprite

[qarmin]

Godot version:
Godot 3.2.4 rc 2

OS/device including version:
Ubuntu 20.04

Issue description:
When executing

extends Node2D

var q_AnimatedSprite : AnimatedSprite = AnimatedSprite.new()

func _ready() -> void:
	add_child(q_AnimatedSprite)

func _process(_delta : float) -> void:

	if randi() % 2 == 0:
		print("Executing AnimatedSprite::set_script")

		var p_object_0 = Reference.new()
		q_AnimatedSprite.set_script(p_object_0)

	if randi() % 2 == 0:
		print("Executing AnimatedSprite::emit_signal")

		q_AnimatedSprite.emit_signal("")

Godot crashes and shows this backtrace

core/object.cpp:1490:46: runtime error: member call on null pointer of type 'struct Script'
core/object.cpp:1490:46: runtime error: member access within null pointer of type 'struct Script'
[1] /lib/x86_64-linux-gnu/libc.so.6(+0x46210) [0x7f1b6f4b5210] (??:0)
[2] Object::emit_signal(StringName const&, Variant const**, int) (/home/rafal/Pulpit/godot3.2/core/object.cpp:1192 (discriminator 12))
[3] Object::_emit_signal(Variant const**, int, Variant::CallError&) (/home/rafal/Pulpit/godot3.2/core/object.cpp:1179)
[4] MethodBindVarArg<Object>::call(Object*, Variant const**, int, Variant::CallError&) (/home/rafal/Pulpit/godot3.2/./core/method_bind.h:345 (discriminator 4))
[5] Object::call(StringName const&, Variant const**, int, Variant::CallError&) (/home/rafal/Pulpit/godot3.2/core/object.cpp:919 (discriminator 1))
[6] Variant::call_ptr(StringName const&, Variant const**, int, Variant*, Variant::CallError&) (/home/rafal/Pulpit/godot3.2/core/variant_call.cpp:1129 (discriminator 1))
[7] GDScriptFunction::call(GDScriptInstance*, Variant const**, int, Variant::CallError&, GDScriptFunction::CallState*) (/home/rafal/Pulpit/godot3.2/modules/gdscript/gdscript_function.cpp:1089)
[8] GDScriptInstance::call_multilevel(StringName const&, Variant const**, int) (/home/rafal/Pulpit/godot3.2/modules/gdscript/gdscript.cpp:1254)
[9] Node::_notification(int) (/home/rafal/Pulpit/godot3.2/scene/main/node.cpp:58)
[10] Node::_notificationv(int, bool) (/home/rafal/Pulpit/godot3.2/./scene/main/node.h:46 (discriminator 14))
[11] CanvasItem::_notificationv(int, bool) (/home/rafal/Pulpit/godot3.2/./scene/2d/canvas_item.h:166 (discriminator 3))
[12] Node2D::_notificationv(int, bool) (/home/rafal/Pulpit/godot3.2/./scene/2d/node_2d.h:38 (discriminator 3))
[13] Object::notification(int, bool) (/home/rafal/Pulpit/godot3.2/core/object.cpp:931)
[14] SceneTree::_notify_group_pause(StringName const&, int) (/home/rafal/Pulpit/godot3.2/scene/main/scene_tree.cpp:988)
[15] SceneTree::idle(float) (/home/rafal/Pulpit/godot3.2/scene/main/scene_tree.cpp:528 (discriminator 3))
[16] Main::iteration() (/home/rafal/Pulpit/godot3.2/main/main.cpp:2113)
[17] OS_X11::run() (/home/rafal/Pulpit/godot3.2/platform/x11/os_x11.cpp:3634)
[18] /usr/bin/godot(main+0x125) [0x16e0bfb] (/home/rafal/Pulpit/godot3.2/platform/x11/godot_x11.cpp:57)
[19] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7f1b6f4960b3] (??:0)
[20] /usr/bin/godot(_start+0x2e) [0x16e0a1e] (??:?)

[angad-k]

will make a PR for this in some time

[lyuma]

Still crashes on latest 4.0 alpha c41e4b1:

Updated some class names in the repro script. Create an empty scene, make a plain Node2D and attach this script:

extends Node2D

var q_AnimatedSprite : AnimatedSprite2D = AnimatedSprite2D.new()

func _ready() -> void:
	add_child(q_AnimatedSprite)

func _process(_delta : float) -> void:

	if randi() % 2 == 0:
		print("Executing AnimatedSprite::set_script")

		var p_object_0 = RefCounted.new()
		q_AnimatedSprite.set_script(p_object_0)

	if randi() % 2 == 0:
		print("Executing AnimatedSprite::emit_signal")

		q_AnimatedSprite.emit_signal("")

[lyuma]

crash log:

Executing AnimatedSprite::set_script
Executing AnimatedSprite::emit_signal

================================================================
CrashHandlerException: Program crashed
Engine version: Godot Engine v4.0.alpha.custom_build (20981a8bca663a2dbf4d125a25d9ac0a0a078e20)
Dumping the backtrace. Please include this when reporting the bug on: https://github.com/godotengine/godot/issues
[0] Object::emit_signalp (S:\repo\godot-fire\core\object\object.cpp:959)
[1] Object::emit_signalp (S:\repo\godot-fire\core\object\object.cpp:959)
[2] Object::_emit_signal (S:\repo\godot-fire\core\object\object.cpp:946)
[3] MethodBindVarArgTR<Object,enum Error>::call (S:\repo\godot-fire\core\object\method_bind.h:245)
[4] GDScriptFunction::call (S:\repo\godot-fire\modules\gdscript\gdscript_vm.cpp:1635)
[5] GDScriptInstance::callp (S:\repo\godot-fire\modules\gdscript\gdscript.cpp:1567)
[6] Node::_notification (S:\repo\godot-fire\scene\main\node.cpp:56)
[7] CanvasItem::_notificationv (S:\repo\godot-fire\scene\main\canvas_item.h:45)
[8] Object::notification (S:\repo\godot-fire\core\object\object.cpp:743)
[9] SceneTree::_notify_group_pause (S:\repo\godot-fire\scene\main\scene_tree.cpp:849)
[10] SceneTree::process (S:\repo\godot-fire\scene\main\scene_tree.cpp:455)
[11] Main::iteration (S:\repo\godot-fire\main\main.cpp:2817)
[12] OS_Windows::run (S:\repo\godot-fire\platform\windows\os_windows.cpp:777)
[13] widechar_main (S:\repo\godot-fire\platform\windows\godot_windows.cpp:175)
[14] _main (S:\repo\godot-fire\platform\windows\godot_windows.cpp:199)
[15] main (S:\repo\godot-fire\platform\windows\godot_windows.cpp:211)
[16] __scrt_common_main_seh (D:\agent\_work\9\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288)
[17] BaseThreadInitThunk
-- END OF BACKTRACE --
================================================================

[akien-mga]

Still reproducible as of 4.0 RC 1.

Simplified MRP:

extends Node

func _ready() -> void:
        var node = Node.new()
        node.set_script(RefCounted.new())
        node.emit_signal("")

[akien-mga]

Still reproducible as of 4.1 beta 3.

#46125 should fix it in 4.2.