Custom Web Export "Unknown file open mode: wx+" error

[ghost]

Godot version:

3.2.3 (I don't know what a commit hash is)

OS/device including version:

Windows 10

Issue description:

I followed this and this tutorial. I disabled a bunch of modules and then compiled Godot 3.2.3. It compiled, but when I put its path in for the debug export for HTML5, the web page gave me the error "Unknown file open mode: wx+".

I don't think the issue is with disabling modules or with my server since I did a compiled a version with nothing disabled and it still didn't work and I also uploaded my project to itch.io and it didn't work on their servers either.

Steps to reproduce:
Honestly, I have no clue how you would reproduce this error because I have no clue if it's my computer or something else.

Minimal reproduction project:

I'm not sure how I would even make a minimal reproduction project.

Edit: I don't think the project is the problem, it's my export template. I made a project with two control nodes and no scripts and it still gave me the same error with the custom templates.

[Calinou]

I get a feeling you've used an invalid File write mode which fails silently on some platforms and loudly on others (namely, HTML5).

I'm not sure how I would even make a minimal reproduction project.

You can also upload your entire project here.

[ghost]

Another thing to note is that my program works fine with the default export templates.
Character Sprite Maker 16x16.zip

[ghost]

If it's a file write issue, I'm not sure how that would work since I don't actually write to a file in the program. I do use the Image.save_png() function but that is only called when it's not exported to HTML5. Instead, I download the image using this plugin.

[Faless]

Emscripten broke compatibility removing those flags (breaking our preload script).
The issue is fixed upstream both in 3.2 (#43986) and 4.0 (#43985).
To solve your use do one of the following:

• Use an emscripten version prior to 2.0.9
• update to the latest godot 3.2 beta build (where it's already fixed), or remove the flags from this file: https://github.com/godotengine/godot/blob/3.2.3-stable/platform/javascript/native/utils.js#L46 and rebuild

[ghost]

Not sure what you mean by remove flags. I changed the line to FS.writeFile(path, new Uint8Array(buffer)); and I got a ton of errors in the dev console when I exported to web.

[Faless]

I changed the line to FS.writeFile(path, new Uint8Array(buffer));

Not sure what errors your are getting, but that's how it's done upstream and it works: https://github.com/godotengine/godot/blob/master/platform/javascript/js/libs/library_godot_os.js#L206

[ghost]

Maybe I have other errors then. The compile process apparently finished at 51% for some reason and the errors in the dev console are stuff like

**ERROR**: Node not found: HBox/ItemDisplay/ItemPanel/Items.
put_char @ tmp_js_export.js:9
tmp_js_export.js:9    At: scene\main\node.cpp:1381:get_node() - Condition "!node" is true. Returned: 0L
put_char @ tmp_js_export.js:9
tmp_js_export.js:9 **ERROR**: Node not found: HBox/PreviewPanel/MarginContainer/PreviewBox.
put_char @ tmp_js_export.js:9
tmp_js_export.js:9    At: scene\main\node.cpp:1381:get_node() - Condition "!node" is true. Returned: 0L
put_char @ tmp_js_export.js:9
tmp_js_export.js:9 **ERROR**: Node not found: HBox/PreviewPanel/MarginContainer/PreviewBox/Flipped/Switch.
put_char @ tmp_js_export.js:9
tmp_js_export.js:9    At: scene\main\node.cpp:1381:get_node() - Condition "!node" is true. Returned: 0L

[Faless]

Yep, those seems unrelated project issues

[Faless]

Yep, those seems unrelated project issues

E.g. you might have disabled some modules or features custom build that you use in your project.

[ghost]

I see. I went on the custom module website thing and just checked as many things as I could. I probably checked too many then.