Parser Error: When trying to run (F5) a project

[produno]

Godot version

4.0 Beta 6

System information

Windows 11

Issue description

When trying to run my project with F5 it halts with Parse Error:
The only information shown is in the console as follows.

E 0:00:02:0469 GDScriptCompiler::_populate_class_members: Condition "!base->is_valid()" is true. Returning: ERR_BUG
<C++ Source> modules\gdscript\gdscript_compiler.cpp:2287 @ GDScriptCompiler::_populate_class_members()

My project is fairly large and runs fine in Beta 5.

in case it helps heres the log when loading up the project:

Godot Engine v4.0.beta6.official.7f8ecffa5 - https://godotengine.org
OpenGL Renderer: NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2
Editing project: C:/SpaceSlog Game/SpaceSlog
Godot Engine v4.0.beta6.official.7f8ecffa5 - https://godotengine.org
Vulkan API 1.2.0 - Using Vulkan Device #0: NVIDIA - NVIDIA GeForce GTX 1080 Ti
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG
at: _populate_class_members (modules/gdscript/gdscript_compiler.cpp:2287)
ERROR: Non-existent native base class.
at: (modules/gdscript/gdscript_analyzer.cpp:4052)
ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG
at: _populate_class_members (modules/gdscript/gdscript_compiler.cpp:2287)
ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG
at: _populate_class_members (modules/gdscript/gdscript_compiler.cpp:2287)
ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG
at: _populate_class_members (modules/gdscript/gdscript_compiler.cpp:2287)
ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG
at: _populate_class_members (modules/gdscript/gdscript_compiler.cpp:2287)
ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG
at: _populate_class_members (modules/gdscript/gdscript_compiler.cpp:2287)
ERROR: Condition "!preset.is_valid()" is true. Continuing.
at: load_config (editor/export/editor_export.cpp:206)
ERROR: Condition "!d.has("handle_modes")" is true. Returning: false
at: _set (scene/resources/animation.cpp:319)

Steps to reproduce

Unfortunately i cannot help much as my project is fairly large. I have tried to narrow the issue down but cannot. Any help with this would be appreciated.

Minimal reproduction project

Please see above.

[TokisanGames]

You might have a cyclic reference in your code, which used to produce CRC errors and now presents Condition "!base->is_valid()" is true for me. The error is not locatable in GDScript, so perhaps you can think about where you are introducing cyclic references and untype the variables. See #67714 (comment)

[adamscott]

CC @rune-scape

[produno]

You might have a cyclic reference in your code, which used to produce CRC errors and now presents Condition "!base->is_valid()" is true for me. The error is not locatable in GDScript, so perhaps you can think about where you are introducing cyclic references and untype the variables. See #67714 (comment)

Your issue seems very similar to mine, though i have no idea where the cyclic reference is, unless it also refers to places where i check class types with x is class.

There are currently no cyclic reference errors whilst using Beta 5.

[issork]

I ran into the issue as well and managed to create a MRP.

MRPCyclicRef.zip

[adamscott]

@issork Thanks for the MRP! It really helped pinning down the issue.

Everybody, if you could test my PR, it would be great. When the Github action will finish, you will be able to download the artifacts to test, if you don't feel to build from source.

[issork]

The PR seems to fix the issue for me, I can run my project again. Thanks!

[rune-scape]

it seems like something may be going wrong in the analyzer? ERROR: Condition "!base->is_valid()" is true. Returning: ERR_BUG may be caused by the "Non-existent native base class." error

[rune-scape]

@adamscott had it right (nice job)
the other error in the analyzer is also a side effect of allowing cyclic references