workaround Mail::Thread memory leak

Thanks to Ask for the patch in
https://rt.cpan.org/Public/Bug/Display.html?id=22817

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/PublicInbox/Thread.pm b/lib/PublicInbox/Thread.pm
new file mode 100644
index 00000000..a2553da7
--- /dev/null
+++ b/lib/PublicInbox/Thread.pm
@@ -0,0 +1,19 @@
+# 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
+# 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.
+package PublicInbox::Thread;
+use strict;
+use warnings;
+use base qw(Mail::Thread);
+sub _container_class { 'PublicInbox::Thread::Container' }
+
+package PublicInbox::Thread::Container;
+use strict;
+use warnings;
+use base qw(Mail::Thread::Container);
+use Scalar::Util qw(weaken);
+sub parent { @_ == 2 ? weaken($_[0]->{parent} = $_[1]) : $_[0]->{parent} }
+
+1;