[Windows/Android]: runtime bug, native.showAlert doest works in coroutine

[Be1zebub]

• I tried searching Solar2D forums for the solution.

Describe the bug
native.showAlert called in coroutine, cant call a listener callback.
Seems like it happens with other functions, i found https://forums.solar2d.com/t/bug-in-native-showalert-callback/318051 which report the same issue with network.setStatusListener on MacOS.

To Reproduce
put in main.lua to minimal reproduce:

coroutine.wrap(function()
    native.showAlert("Title", "Desc", {"OK"}, print)
end)()

Target platform and where build was made:
On Android 13 (DokeOS 4.0, live build) - nothing happens, callback just not called

Windows 10 22H2, Simulator: runtime error, with no info.

20:40:17.032  ERROR: Runtime error
20:40:17.032  attempt to call a nil value

whole test project or build.settings
Just empty project, with main.lua, no build.settings

coroutine.wrap(function()
    native.showAlert("Title", "Desc", {"OK"}, print)
end)()

[Be1zebub]

Workaround:

coroutine.wrap(function()
    timer.performWithDelay(0, function()
        native.showAlert("Title", "Desc", {"OK"}, print)
    end)
end)()

[ggcrunchy]

The relevant line is: https://github.com/coronalabs/corona/blob/master/librtt/Rtt_LuaLibNative.cpp#L107

That LuaResource( ... ) bit is trying to pull the function off the wrong stack, after it grabs the main Lua state. (I don't know what the motivation for doing that is, off-hand.)

Temporarily copying the function onto the main state's stack seems to work. Tested with this replacement code:

            LuaContext *ctx = LuaContext::GetContext( L );
            if ( ctx->L() != L )
            {
                lua_pushvalue( L, callbackIndex );
                lua_xmove( L, ctx->L(), 1 );
                
                callbackIndex = -1;
            }
            resource = Rtt_NEW( & platform.GetAllocator(), LuaResource( ctx->LuaState(), callbackIndex ) );
            if ( ctx->L() != L )
            {
                lua_pop( ctx->L(), 1 );
            }

This was tested on Mac.

[clang-clang-clang]

I also encountered this problem, in coroutine can get normal parameters, string, number, etc., but can not get callback (on a different lua_State).