Uncaught RuntimeError: invalid index into function table with 1.39.0

[ShuangLiu1992]

I'm getting Uncaught RuntimeError: invalid index into function table with the latest version 1.39.0, tried master as well. Also std::string seems to pick up some random garbage memory.

It happens when making calls to functions in static library targets create in cmake add_subdirectory, both of which are compiled with the cmake tool chain file that came with the sdk

I haven't been able to identify where went wrong.

Can confirm the same code works with 1.38.48.

wasm-0f0acda6-2498:1 Uncaught RuntimeError: invalid index into function table
    at std::__2::__function::__policy_func<bool (int, nlohmann::detail::parser<nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer> >::parse_event_t, nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer>&)>::__policy_func(std::__2::__function::__policy_func<bool (int, nlohmann::detail::parser<nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer> >::parse_event_t, nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer>&)> const&) (wasm-function[2498]:0x682ee)
    at std::__2::function<bool (int, nlohmann::detail::parser<nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer> >::parse_event_t, nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer>&)>::function(std::__2::function<bool (int, nlohmann::detail::parser<nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer> >::parse_event_t, nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer>&)> const&) (wasm-function[2032]:0x55961)
    at nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer>::parse(nlohmann::detail::input_adapter&&, std::__2::function<bool (int, nlohmann::detail::parser<nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer> >::parse_event_t, nlohmann::basic_json<std::__2::map, std::__2::vector, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, bool, long long, unsigned long long, double, std::__2::allocator, nlohmann::adl_serializer>&)>, bool) (wasm-function[2009]:0x54615)
    at exec_json(std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > const&) (wasm-function[2002]:0x53b61)
    at _exec_json(std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >) (wasm-function[104]:0x6041)
    at emscripten::internal::Invoker<std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > >::invoke(std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> > (*)(std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >), emscripten::internal::BindingType<std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char> >, void>::'unnamed'*) (wasm-function[109]:0x6246)
    at dynCall_iii (wasm-function[14915]:0x2b5c80)
    at Module.dynCall_iii (https://192.168.1.94:4443/gl_camera_web.js:8940:39)
    at dynCall_iii_5 (eval at makeDynCaller (https://192.168.1.94:4443/gl_camera_web.js:5607:19), <anonymous>:2:12)
    at Object.exec_json (eval at new_ (https://192.168.1.94:4443/gl_camera_web.js:5418:27), <anonymous>:6:10)

[kripken]

This may be related to the backend change in 1.39.0. Does 1.39.0-fastcomp work?

This may be related to emscripten-core/emscripten#9013 which is a known open issue with the new backend atm.

If that's not it, the new backend has sanitizers that can help: https://emscripten.org/docs/debugging/Sanitizers.html

[ShuangLiu1992]

I will try 1.39.0-fastcomp and report back.
Does it mean I can't use -fPIC with 1.39.0 for now?

[ShuangLiu1992]

1.39.0-fastcomp works.

[ShuangLiu1992]

removing fPIC for all dependency solved the problem (very tedious though), closing this issue.

[kripken]

Thanks @ShuangLiu1992 , then this is the same as emscripten-core/emscripten#9013 - we are working on a fix for it, sorry for the breakage meanwhile.