Await Module - TypeError: default is not a function

[paulocoutinhox]

Hi,

Im trying update to latest emscripten version 4.0.7 and im getting this error:

 FAIL  tests/unit/client.spec.ts > Client
TypeError: default is not a function
 ❯ tests/unit/client.spec.ts:32:44
     30|     beforeAll(async () => {
     31|         // initialize module
     32|         const module: IXWasmModule = await Module();
       |                                            ^
     33|         XPLPC.shared().initialize(module, new XConfig(new JsonSerializ…
     34| 

Ref: https://github.com/xplpc/xplpc/blob/main/wasm/sample/tests/unit/client.spec.ts#L32

Log full: https://github.com/xplpc/xplpc/actions/runs/14507299625/job/40698976285#step:12:53

Flags in CMake:

# wasm linker flags
set(XPLPC_WASM_LINKER_FLAGS
    # core functionality
    "--bind"
    "-fwasm-exceptions"
    # memory options
    "-sMALLOC=emmalloc"
    "-sWASM_BIGINT=1"
    "-sALLOW_MEMORY_GROWTH=1"
    # module options
    "-sMODULARIZE=1"
    "-sEXPORT_ES6=1"
    # exported functions and methods
    "-sEXPORTED_FUNCTIONS=_malloc,_free"
    "-sEXPORTED_RUNTIME_METHODS=HEAPU8"
)

# wasm compiler flags
set(XPLPC_WASM_COMPILER_FLAGS
    # core functionality
    "-fwasm-exceptions"
)

# apply flags
string(JOIN " " XPLPC_WASM_LINKER_FLAGS_STR "${XPLPC_WASM_LINKER_FLAGS}")
string(JOIN " " XPLPC_WASM_COMPILER_FLAGS_STR "${XPLPC_WASM_COMPILER_FLAGS}")

set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${XPLPC_WASM_LINKER_FLAGS_STR}")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${XPLPC_WASM_COMPILER_FLAGS_STR}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${XPLPC_WASM_COMPILER_FLAGS_STR}")

add_compile_definitions(XPLPC_TARGET_WASM)
add_subdirectory(wasm/lib)

set(XPLPC_ALL_FILES ${XPLPC_INC_FILES} ${XPLPC_SRC_FILES})
add_executable(${XPLPC_PROJECT_NAME} "${XPLPC_ALL_FILES}")

target_link_libraries(${XPLPC_PROJECT_NAME} PRIVATE embind)

Can anyone help?

Thanks.

[sbc100]

Thanks for the report. We have been making changes to some of the ES6 export stuff so this is likely a regression.

Did this work in 4.0.6?

[paulocoutinhox]

Hi,

1 - The version 4.0.6 have same errors

2 - The console.log(Module) is:

{
  BindingError: [class BindingError extends Error],
  InternalError: [class InternalError extends Error],
  count_emval_handles: [Function: count_emval_handles]
}

3 - The typeof Module is: object

4 - I have attached the files if it help in something

bin.zip

[sbc100]

What was the last version where this test passed?

So the Module in this case is the instance rather then a factory function. This is similar to the new experimental -sMODULARIZE=instance thing that we are adding right now.. but you are not using that so it shouldn't be the case.

[paulocoutinhox]

Hi,

You make a good question, because im testing here and no version is working now.

After re-check, i see that is how the flags are passed from CMakeLists.txt. I dont know why, but only works when is everything inside a string. But this is another problem, and now it is working with latest version (4.0.7).

[sbc100]

Ah, so this looks like maybe cmake issue and the -sMODULARIZE flag was not being passed correctly?

BTW, when enabling settings you don't need to specify the =1 at the end.

[paulocoutinhox]

Yes, something happen that break it.

Also, you remove a doubt that i have a long time about need be with =1 or without it.

Thanks.