use of int and overflow review

[chiark-tcl.git] / base / scriptinv.c

diff --git a/base/scriptinv.c b/base/scriptinv.c
index 5757d47b52f9ef8549a577ee29f76b7d2a050f78..26d5030f762ed6fd62c5e16eaebd8c17f9403ccc 100644 (file)
--- a/base/scriptinv.c
+++ b/base/scriptinv.c
@@ -45,6 +45,7 @@ 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;
   }