diff options
Diffstat (limited to 'lstrlib.c')
-rw-r--r-- | lstrlib.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -1271,8 +1271,10 @@ static int str_format (lua_State *L) { } case 'p': { const void *p = lua_topointer(L, arg); - if (p == NULL) - p = "(null)"; /* NULL not a valid parameter in ISO C 'printf' */ + if (p == NULL) { /* avoid calling 'printf' with argument NULL */ + p = "(null)"; /* result */ + form[strlen(form) - 1] = 's'; /* format it as a string */ + } nb = l_sprintf(buff, maxitem, form, p); break; } |