lua

commit e0cbaa50fa7e97a8b7404041a59caac47b3949a5
parent 37474873203f247552021ab5856ab69d777166a2
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Tue, 17 Dec 2019 10:49:28 -0300

Added test for NULL in string.format("%p")

ISO C states that standard library functions should not be called
with NULL arguments, unless stated otherwise. 'sprintf' does not
state otherwise, and it doesn't hurt to be on the safe side.

Diffstat:
M
lstrlib.c
 | 
2
++

1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/lstrlib.c b/lstrlib.c
@@ -1271,6 +1271,8 @@ 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' */
           nb = l_sprintf(buff, maxitem, form, p);
           break;
         }