* range.c (rb_range_beg_len): Fix potential bug for limit case [#6203]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37775 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

range.c

@@ -1076,16 +1076,16 @@ rb_range_beg_len(VALUE range, long *begp, long *lenp, long len, int err)
 	if (beg < 0)
 	    goto out_of_range;
     }
+    if (end < 0)
+	end += len;
+    if (!excl)
+	end++;			/* include end point */
     if (err == 0 || err == 2) {
 	if (beg > len)
 	    goto out_of_range;
 	if (end > len)
 	    end = len;
     }
-    if (end < 0)
-	end += len;
-    if (!excl)
-	end++;			/* include end point */
     len = end - beg;
     if (len < 0)
 	len = 0;