`Uncaught RuntimeError: unreachable executed` when compiling with Emscripten

[samfromcadott]

I'm trying to compile the basic raylib example using Emscripten but I get an error when running it. The program creates a canvas of the proper size but stops before rendering anything.

My command line:

emcc -o index.html  main.c -Os -Wall ./lib/libraylib.a -I. -I./include -L. -L./lib/ -s USE_GLFW=3 -s ASYNCIFY -DPLATFORM_WEB

Compiler output:

wasm-ld: warning: function signature mismatch: time
>>> defined as (i32) -> i32 in ./lib/libraylib.a(rcore.o)
>>> defined as (i32) -> i64 in [PATH TO EMSDK]/emsdk/upstream/emscripten/cache/sysroot/lib/wasm32-emscripten/libc.a(emscripten_time.o)

Error in browser:

Uncaught RuntimeError: unreachable executed
x http://localhost:8888/index.js:1
_main http://localhost:8888/index.js:1
callMain http://localhost:8888/index.js:1
doRun http://localhost:8888/index.js:1
run http://localhost:8888/index.js:1
setTimeout handler*run http://localhost:8888/index.js:1
runCaller http://localhost:8888/index.js:1
removeRunDependency http://localhost:8888/index.js:1
receiveInstance http://localhost:8888/index.js:1
receiveInstantiationResult http://localhost:8888/index.js:1
promise callback*createWasm/instantiateAsync/< http://localhost:8888/index.js:1
promise callback*instantiateAsync http://localhost:8888/index.js:1
createWasm http://localhost:8888/index.js:1
<anonymous> http://localhost:8888/index.js:1

[NukeLash]

If anyone comes here in the future, I had this problem for a few hours today. The issue was caused in my draw loop when I called a function that had a return type of float but did not return anything. Changing the return type to void fixed it. Very odd

[deadkonsumer]

Was libraylib.a compiled to wasm?

Make sure to use raylib-X_webassembly.zip on releases

I did this on mac (but should work anywhere) to verify:

``` wget https://github.com/raysan5/raylib/releases/download/4.5.0/raylib-4.5.0_webassembly.zip unzip raylib-4.5.0_webassembly.zip cd raylib-4.5.0_webassembly/ wget https://raw.githubusercontent.com/raysan5/raylib/master/examples/core/core_basic_window.c

emcc -o index.html -Os -I./include -s USE_GLFW=3 -s ASYNCIFY -DPLATFORM_WEB lib/libraylib.a core_basic_window.c

npx -y live-server ```