commit https://github.com/vim/vim/commit/f6157284de71d8881f3b89fbd79d1ecbf842929f Author: Bram Moolenaar <Bram@vim.org> Date: Wed Feb 10 21:07:14 2016 +0100 patch 7.4.1299 Problem: When the server sends a message with ID zero the channel handler is not invoked. (Christian J. Robinson) Solution: Recognize zero value for the request ID. Add a test for invoking the channel handler.

/* if_lua.c */
int lua_enabled(int verbose);
void lua_end(void);
void ex_lua(exarg_T *eap);
void ex_luado(exarg_T *eap);
void ex_luafile(exarg_T *eap);
void lua_buffer_free(buf_T *o);
void lua_window_free(win_T *o);
void do_luaeval(char_u *str, typval_T *arg, typval_T *rettv);
int set_ref_in_lua(int copyID);
/* vim: set ft=c : */