Emscripten bindings usage in pthread leads to error

[Andrii Vovk]

Hello,

let me share a sample for reproducing the issue which occurs when using Emscripten bindings in pthread.

Compilation arguments:

$ emcc --bind -o build/emscripten_bindings_pthread.js -s USE_PTHREADS=1 -s PROXY_TO_PTHREAD=1 emscripten_bindings_pthread.cpp

Expected behavior:

invoke() called with "test" argument log message displaying in browser console.

Actual behavior:

Error is thrown.

Uncaught TypeError: Cannot read property 'value' of undefined at requireHandle (http://localhost:8000/build/emscripten_bindings_pthread.js:2378:41) at __emval_call_void_method (http://localhost:8000/build/emscripten_bindings_pthread.js:3945:16) at <anonymous>:wasm-function[138]:0x2681 at <anonymous>:wasm-function[137]:0x2603 at <anonymous>:wasm-function[133]:0x2554 at <anonymous>:wasm-function[132]:0x24fe at <anonymous>:wasm-function[47]:0xec1 at Object.dynCall (http://localhost:8000/build/emscripten_bindings_pthread.js:1790:33) at onmessage (http://localhost:8000/build/emscripten_bindings_pthread.worker.js:130:39)

[Andrii Vovk]

Issue #8299 on GitHub looks similar, is it related?