$OpenBSD: patch-bin_pt-summary,v 1.5 2012/10/09 15:39:13 giovanni Exp $
--- bin/pt-summary.orig	Tue Sep 25 17:35:54 2012
+++ bin/pt-summary	Tue Oct  9 16:54:29 2012
@@ -2279,8 +2279,9 @@ sigtrap() { local PTFUNCNAME=sigtrap;
 
 # Execute the program if it was not included from another file.  This makes it
 # possible to include without executing, and thus test.
+set +u
 if    [ "${0##*/}" = "$TOOL" ] \
-   || [ "${0##*/}" = "bash" -a "$_" = "$0" ]; then
+   || [ "${0##*/}" = "sh" -a "$_" = "$0" ]; then
 
    # Set up temporary dir.
    mk_tmpdir
