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-rw-r--r--lib/PublicInbox/MsgIter.pm8
1 files changed, 4 insertions, 4 deletions
diff --git a/lib/PublicInbox/MsgIter.pm b/lib/PublicInbox/MsgIter.pm
index 6453d9f1..cdd78b39 100644
--- a/lib/PublicInbox/MsgIter.pm
+++ b/lib/PublicInbox/MsgIter.pm
@@ -12,8 +12,8 @@ use PublicInbox::MIME;
 # Like Email::MIME::walk_parts, but this is:
 # * non-recursive
 # * passes depth and indices to the iterator callback
-sub msg_iter ($$) {
-        my ($mime, $cb) = @_;
+sub msg_iter ($$;$) {
+        my ($mime, $cb, $cb_arg) = @_;
         my @parts = $mime->subparts;
         if (@parts) {
                 my $i = 0;
@@ -27,11 +27,11 @@ sub msg_iter ($$) {
                                 @sub = map { [ $_, $depth, @idx, ++$i ] } @sub;
                                 @parts = (@sub, @parts);
                         } else {
-                                $cb->($p);
+                                $cb->($p, $cb_arg);
                         }
                 }
         } else {
-                $cb->([$mime, 0, 0]);
+                $cb->([$mime, 0, 0], $cb_arg);
         }
 }