Jeff King [off-list ref] writes:
Ah. The problem is that git-send-email unconditionally adds a
message-id. Usually git-format-patch doesn't add one, but for obvious
reasons, it must when doing --thread. Here is a fix.
quoted hunk
diff --git a/git-send-email.perl b/git-send-email.perl
index 1d6f466..083466a 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -580,7 +580,7 @@ sub send_message
$ccline = "\nCc: $cc";
}
my $sanitized_sender = sanitize_address($sender);
- make_message_id();
+ make_message_id() unless defined($message_id);
Isn't this called inside a loop? If the outgoing message does not
originally have "Message-Id:", does the loop correctly reinitialize
$message_id to undef, or does this change make everybody reuse the same
$message_id over and over again?
I have a feeling that --thread to format-patch is a misfeature. Why is
it needed if you are feeding the output to send-email?
I wonder if stripping existing "Message-Id:" away just like we strip
away "Date:" from @xh would be a much saner fix.