Function luaL_traceback

ThirdParty/lua/lua/lauxlib.c:125–151

LUALIB_API void luaL_traceback (lua_State *L, lua_State *L1,
                                const char *msg, int level) {
  lua_Debug ar;
  int top = lua_gettop(L);
  int numlevels = countlevels(L1);
  int mark = (numlevels > LEVELS1 + LEVELS2) ? LEVELS1 : 0;
  if (msg) lua_pushfstring(L, "%s\n", msg);
  lua_pushliteral(L, "stack traceback:");
  while (lua_getstack(L1, level++, &ar)) {
    if (level == mark) {  /* too many levels? */
      lua_pushliteral(L, "\n\t...");  /* add a '...' */
      level = numlevels - LEVELS2;  /* and skip to last ones */
    }
    else {
      lua_getinfo(L1, "Slnt", &ar);
      lua_pushfstring(L, "\n\t%s:", ar.short_src);
      if (ar.currentline > 0)
        lua_pushfstring(L, "%d:", ar.currentline);
      lua_pushliteral(L, " in ");
      pushfuncname(L, &ar);
      if (ar.istailcall)
        lua_pushliteral(L, "\n\t(...tail calls...)");
      lua_concat(L, lua_gettop(L) - top);
    }
  }
  lua_concat(L, lua_gettop(L) - top);
}

/* }====================================================== */