Detail

Reports errors with "?:?:" (instead of "?👎") when there is no debug
information.

ldebug.c

@@ -817,16 +817,15 @@ l_noret luaG_ordererror (lua_State *L, const TValue *p1, const TValue *p2) {
 /* add src:line information to 'msg' */
 const char *luaG_addinfo (lua_State *L, const char *msg, TString *src,
                                         int line) {
-  char buff[LUA_IDSIZE];
-  if (src) {
+  if (src == NULL)  /* no debug information? */
+    return luaO_pushfstring(L, "?:?: %s", msg);
+  else {
+    char buff[LUA_IDSIZE];
     size_t idlen;
     const char *id = getlstr(src, idlen);
     luaO_chunkid(buff, id, idlen);
+    return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
   }
-  else {  /* no source available; use "?" instead */
-    buff[0] = '?'; buff[1] = '\0';
-  }
-  return luaO_pushfstring(L, "%s:%d: %s", buff, line, msg);
 }