thread: another workaround for a Mail::Thread bug

[public-inbox.git] / lib / PublicInbox / Thread.pm

diff --git a/lib/PublicInbox/Thread.pm b/lib/PublicInbox/Thread.pm
index 58efb8dc5872ed01fc0a3824654c200d4010f26d..92404faa258c593d82720f0904db8d32e1a047cb 100644 (file)
--- a/lib/PublicInbox/Thread.pm
+++ b/lib/PublicInbox/Thread.pm
@@ -1,5 +1,10 @@
 # subclass Mail::Thread and use this to workaround a memory leak
 # Based on the patch in: https://rt.cpan.org/Public/Bug/Display.html?id=22817
+#
+# Additionally, workaround for a bug where $walk->topmost returns undef:
+# - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=795913
+# - https://rt.cpan.org/Ticket/Display.html?id=106498
+#
 # License differs from the rest of public-inbox (but is compatible):
 # This library is free software; you can redistribute it and/or modify
 # it under the same terms as Perl itself.
@@ -33,4 +38,19 @@ use base qw(Mail::Thread::Container);
 use Scalar::Util qw(weaken);
 sub parent { @_ == 2 ? weaken($_[0]->{parent} = $_[1]) : $_[0]->{parent} }
 
+sub topmost {
+       $_[0]->SUPER::topmost || PublicInbox::Thread::CPANRTBug106498->new;
+}
+
+# ref:
+# - http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=795913
+# - https://rt.cpan.org/Ticket/Display.html?id=106498
+package PublicInbox::Thread::CPANRTBug106498;
+use strict;
+use warnings;
+
+sub new { bless {}, $_[0] }
+
+sub simple_subject {}
+
 1;