[core] Running the web example throws an exception.

[valtsu41]

printErr @ core_basic_window.html:1
core_basic_window.html:1 falling back to ArrayBuffer instantiation
printErr @ core_basic_window.html:1
core_basic_window.html:1 INFO: Initializing raylib 2.5-dev
core_basic_window.html:1 INFO: Display device initialized successfully
core_basic_window.html:1 INFO: Render size: 800 x 450
core_basic_window.html:1 INFO: Screen size: 800 x 450
core_basic_window.html:1 INFO: Viewport offsets: 0, 0
core_basic_window.html:1 INFO: GPU: Vendor:   WebKit
core_basic_window.html:1 INFO: GPU: Renderer: WebKit WebGL
core_basic_window.html:1 INFO: GPU: Version:  OpenGL ES 2.0 (WebGL 1.0 (OpenGL ES 2.0 Chromium))
core_basic_window.html:1 INFO: GPU: GLSL:     OpenGL ES GLSL ES 1.00 (WebGL GLSL ES 1.0 (OpenGL ES GLSL ES 1.0 Chromium))
core_basic_window.html:1 INFO: Number of supported extensions: 47
core_basic_window.html:1 INFO: [EXTENSION] VAO extension detected, VAO functions initialized successfully
core_basic_window.html:1 WARNING: [EXTENSION] NPOT textures extension not found, limited NPOT support (no-mipmaps, no-repeat)
core_basic_window.html:1 INFO: [EXTENSION] DXT compressed textures supported
core_basic_window.html:1 INFO: [TEX ID 1] Texture created successfully (1x1 - 1 mipmaps)
core_basic_window.html:1 INFO: [TEX ID 1] Base white texture loaded successfully
core_basic_window.html:1 INFO: [SHDR ID 2] Shader compiled successfully
core_basic_window.html:1 INFO: [SHDR ID 3] Shader compiled successfully
core_basic_window.html:1 INFO: [SHDR ID 4] Shader program loaded successfully
core_basic_window.html:1 INFO: [SHDR ID 4] Default shader loaded successfully
core_basic_window.html:1 INFO: Internal buffers initialized successfully (CPU)
core_basic_window.html:1 Invalid function pointer called with signature 'vii'. Perhaps this is an invalid value (e.g. caused by calling a virtual method on a NULL pointer)? Or calling a function with an incorrect type, which will fail? (it is worth building your source files with -Werror (warnings are errors), as warnings can indicate undefined behavior which can cause this)
printErr @ core_basic_window.html:1
core_basic_window.html:1 Build with ASSERTIONS=2 for more info.
printErr @ core_basic_window.html:1
core_basic_window.html:1 19
core_basic_window.html:1 19
printErr @ core_basic_window.html:1
core_basic_window.html:1 exception thrown: abort(19) at Error
    at jsStackTrace (http://localhost:8080/core/core_basic_window.js:1:10810)
    at stackTrace (http://localhost:8080/core/core_basic_window.js:1:10981)
    at abort (http://localhost:8080/core/core_basic_window.js:1:648516)
    at nullFunc_vii (http://localhost:8080/core/core_basic_window.js:1:599392)
    at wasm-function[305]:27976
    at wasm-function[307]:42
    at wasm-function[305]:22392
    at wasm-function[305]:4741
    at wasm-function[305]:4741
    at wasm-function[305]:4741
printErr @ core_basic_window.html:1
core_basic_window.js:1 Uncaught abort(19) at Error
    at jsStackTrace (http://localhost:8080/core/core_basic_window.js:1:10810)
    at stackTrace (http://localhost:8080/core/core_basic_window.js:1:10981)
    at abort (http://localhost:8080/core/core_basic_window.js:1:648516)
    at nullFunc_vii (http://localhost:8080/core/core_basic_window.js:1:599392)
    at wasm-function[305]:27976
    at wasm-function[307]:42
    at wasm-function[305]:22392
    at wasm-function[305]:4741
    at wasm-function[305]:4741
    at wasm-function[305]:4741

Happens when trying to run the web example. My browser is Chromium, and I built the example by copying the command from make and changing the paths to work with Linux.

[raysan5]

Please, could you post the code you are compiling?

Just remember that game loop must be adapted for web.

[valtsu41]

As the title says, I'm compiling the web example (core_basic_window_web.c). (At least I think so.)

[valtsu41]

Could this be related to that I am using Raspberry Pi?

[raysan5]

This is a very weird error, I've been investigating it and seems related to latest emscripten... In the meantime I pushed a solution on commit 0c567cd.

Please, let me know if it works.

[valtsu41]

It does not.

core_basic_window.html:1 Rules for selecting event targets in HTML5 API are changing: instead of using document.getElementById() that only can refer to elements by their DOM ID, new event target selection mechanism uses the more flexible function document.querySelector() that can look up element names, classes, and complex CSS selectors. Build with -s DISABLE_DEPRECATED_FIND_EVENT_TARGET_BEHAVIOR=1 to change to the new lookup rules. See https://github.com/emscripten-core/emscripten/pull/7977 for more details.
printErr @ core_basic_window.html:1
core_basic_window.html:1 INFO: Target time per frame: 16.667 milliseconds
core_basic_window.html:1 exception thrown: Please compile your program with async support in order to use asynchronous operations like emscripten_sleep
printErr @ core_basic_window.html:1
core_basic_window.js:1 Uncaught Please compile your program with async support in order to use asynchronous operations like emscripten_sleep

[valtsu41]

-s EMTERPRETIFY=1 -s EMTERPRETIFY_ASYNC=1
Makes it work.

[raysan5]

Per your output it seems you're compiling core_basic_window instead of core_basic_window_web or PLATFORM_WEB is not properly defined, it's the only possibility if asking for async support... and the reason it works with Emterpreter enabled...

In any case, nice to read it worked.

[RandomErrorMessage]

This is a very weird error, I've been investigating it and seems related to latest emscripten... In the meantime I pushed a solution on commit 0c567cd.

Please, let me know if it works.

Thanks, your commit fixed the exception issue for me. Though, I question your hardcoding of emsdk environment variables. It causes emcc to not be found when using the environmental script as provided by emscripten. By commenting out the hardcoded environment variables from the Makefile, I'm able to transpile properly.

[valtsu41]

@RandomErrorMessage Should you make that a separate issue?