From 9f141841efc80dbe7a3ef8cc8fbae102c9cd190b Mon Sep 17 00:00:00 2001
From: Joey Hess <joey@gnu.kitenet.net>
Date: Wed, 17 Dec 2008 18:56:32 -0500
Subject: [PATCH] don't rely on $@

A malformed pagespec will cause $@ to be set when translated, but if
it is used a second time, the memoization will defeat that check. Better to
check for the result not being defined.
---
 IkiWiki.pm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/IkiWiki.pm b/IkiWiki.pm
index d93ff7374..2a3a84d9a 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -1797,7 +1797,8 @@ sub pagespec_match ($$;@) {
 	}
 
 	my $sub=pagespec_translate($spec);
-	return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"") if $@;
+	return IkiWiki::FailReason->new("syntax error in pagespec \"$spec\"")
+		if $@ || ! defined $sub;
 	return $sub->($page, @params);
 }