X-Git-Url: http://www.git.stargrave.org/?p=public-inbox.git;a=blobdiff_plain;f=lib%2FPublicInbox%2FFilter%2FSubjectTag.pm;h=7735a94a049f431ccf5bc785cc1315a162ab0fb7;hp=1d2814255f9bbe6611186b3a99353ebe268fe26f;hb=e772b371ea15d5903720a00c7c24b535e781b4bf;hpb=6dd8be30a9aeefa550b05a4f298934fd37a25c2c

diff --git a/lib/PublicInbox/Filter/SubjectTag.pm b/lib/PublicInbox/Filter/SubjectTag.pm
index 1d281425..7735a94a 100644
--- a/lib/PublicInbox/Filter/SubjectTag.pm
+++ b/lib/PublicInbox/Filter/SubjectTag.pm
@@ -19,8 +19,10 @@ sub new {
 sub scrub {
 	my ($self, $mime) = @_;
 	my $subj = $mime->header('Subject');
-	$subj =~ s/$self->{tag_re}/$1/; # $1 is "Re: "
-	$mime->header_str_set('Subject', $subj);
+	if (defined $subj) {
+		$subj =~ s/$self->{tag_re}/$1/; # $1 is "Re: "
+		$mime->header_str_set('Subject', $subj);
+	}
 	$self->ACCEPT($mime);
 }