luaL_argerror
[-0, +0, v]
int luaL_argerror (lua_State *L, int arg, const char *extramsg);
Raises an error reporting a problem with argument arg
of the C function that called it, using a standard message that includes extramsg
as a comment:
bad argument #arg to 'funcname' (extramsg)
This function never returns.
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