* string.c (rb_str_update): get rid of SEGV at just allocated String.

[ruby-core:01812]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5058 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun Nov 30 09:35:14 2003  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* string.c (rb_str_update): get rid of SEGV at just allocated String.
+	  [ruby-core:01812]
+
 Fri Nov 28 23:19:34 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* gc.c (gc_mark): explicitly check mark recursion levels, instead

string.c

@@ -1314,7 +1314,9 @@ rb_str_update(str, beg, len, val)
 	memmove(RSTRING(str)->ptr+beg, RSTRING(val)->ptr, RSTRING(val)->len);
     }
     RSTRING(str)->len += RSTRING(val)->len - len;
-    RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
+    if (RSTRING(str)->ptr) {
+	RSTRING(str)->ptr[RSTRING(str)->len] = '\0';
+    }
     OBJ_INFECT(str, val);
 }