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+From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>\r
+To: Notmuch Mail <notmuch@notmuchmail.org>\r
+Subject: [PATCH v4 7/7] complete ghost-on-removal-when-shared-thread-exists\r
+Date: Fri, 8 Apr 2016 22:54:52 -0300\r
+Message-Id: <1460166892-29721-7-git-send-email-dkg@fifthhorseman.net>\r
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+ <1460166892-29721-1-git-send-email-dkg@fifthhorseman.net>\r
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+\r
+To fully complete the ghost-on-removal-when-shared-thread-exists\r
+proposal, we need to clear all ghost messages when the last active\r
+message is removed from a thread.\r
+---\r
+ lib/message.cc | 20 ++++++++++++++++++++\r
+ test/T590-thread-breakage.sh | 6 +-----\r
+ 2 files changed, 21 insertions(+), 5 deletions(-)\r
+\r
+diff --git a/lib/message.cc b/lib/message.cc\r
+index 1b423b0..39dbe53 100644\r
+--- a/lib/message.cc\r
++++ b/lib/message.cc\r
+@@ -1098,6 +1098,26 @@ _notmuch_message_delete (notmuch_message_t *message)\r
+ \r
+ notmuch_message_destroy (ghost);\r
+ status = COERCE_STATUS (private_status, "Error converting to ghost message");\r
++ } else {\r
++ /* the thread is empty; drop all ghost messages from it */\r
++ notmuch_messages_t *messages;\r
++ status = _notmuch_query_search_documents (query,\r
++ "ghost",\r
++ &messages);\r
++ if (status == NOTMUCH_STATUS_SUCCESS) {\r
++ notmuch_status_t last_error = NOTMUCH_STATUS_SUCCESS;\r
++ while (notmuch_messages_valid (messages)) {\r
++ message = notmuch_messages_get (messages);\r
++ status = _notmuch_message_delete (message);\r
++ if (status) /* we'll report the last failure we see;\r
++ * if there is more than one failure, we\r
++ * forget about previous ones */\r
++ last_error = status;\r
++ notmuch_message_destroy (message);\r
++ notmuch_messages_move_to_next (messages);\r
++ }\r
++ status = last_error;\r
++ }\r
+ }\r
+ notmuch_query_destroy (query);\r
+ return status;\r
+diff --git a/test/T590-thread-breakage.sh b/test/T590-thread-breakage.sh\r
+index 81f27db..45446b9 100755\r
+--- a/test/T590-thread-breakage.sh\r
++++ b/test/T590-thread-breakage.sh\r
+@@ -121,10 +121,6 @@ notmuch new >/dev/null\r
+ test_thread_count 0 'All messages gone: no threads'\r
+ test_content_count apple 0\r
+ test_content_count banana 0\r
+-test_begin_subtest 'No ghosts should remain after full thread deletion'\r
+-# this is known to fail; we are leaking ghost messages deliberately\r
+-test_subtest_known_broken\r
+-ghosts=$(../ghost-report ${MAIL_DIR}/.notmuch/xapian)\r
+-test_expect_equal "$ghosts" "0"\r
++test_ghost_count 0 'No ghosts should remain after full thread deletion'\r
+ \r
+ test_done\r
+-- \r
+2.8.0.rc3\r
+\r