X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=blobdiff_plain;f=base%2Fscriptinv.c;h=7b67d299af4af002a076ba79e480188635c3345e;hb=5f66b4d08a96e0effeed6b84c73bb0d82edceefa;hp=a066572c2873ecc3edff403574c8f6cc2a89f350;hpb=f16e3e0cf0a2b965643df01e24ef59e1393da78d;p=chiark-tcl.git

diff --git a/base/scriptinv.c b/base/scriptinv.c
index a066572..7b67d29 100644
--- a/base/scriptinv.c
+++ b/base/scriptinv.c
@@ -1,4 +1,19 @@
 /*
+ * base code for various Tcl extensions
+ * Copyright 2006-2012 Ian Jackson
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "chiark-tcl-base.h"
@@ -28,6 +43,7 @@ int cht_scriptinv_set(ScriptToInvoke *si, Tcl_Interp *ip,
   if (xargs) {
     rc= Tcl_ListObjLength(ip, xargs, &xlength);  if (rc) return rc;
     Tcl_IncrRefCount(xargs);
+    assert(si->llen < INT_MAX/2 && xlength < INT_MAX/2);
     si->llen += xlength;
   }