* Detect invalid pagespecs and do not merge them in add_depends,

  as that can result in a broken merged pagespec that matches nothing.

1 files changed, 13 insertions, 0 deletions

diff --git a/IkiWiki.pm b/IkiWiki.pm
index 668de7e93..bd804269d 100644
--- a/IkiWiki.pm
+++ b/IkiWiki.pm
@@ -1106,6 +1106,8 @@ sub add_depends ($$) { #{{{
 	my $page=shift;
 	my $pagespec=shift;
 	
+	return unless pagespec_valid($pagespec);
+
 	if (! exists $depends{$page}) {
 		$depends{$page}=$pagespec;
 	}
@@ -1234,6 +1236,17 @@ sub pagespec_match ($$;@) { #{{{
 	return $ret;
 } #}}}
 
+sub pagespec_valid ($) { #{{{
+	my $spec=shift;
+
+	# used by generated code
+	my $page="";
+	my @params;
+
+	eval pagespec_translate($spec);
+	return ! $@;
+} #}}}
+
 package IkiWiki::FailReason;
 
 use overload ( #{{{