This should finally fix #6896. Let's watch the buildbots.
diff --git a/Lib/mailbox.py b/Lib/mailbox.py
index 305b2d2..74359b7 100755
--- a/Lib/mailbox.py
+++ b/Lib/mailbox.py
@@ -238,6 +238,9 @@
raise NoSuchMailboxError(self._path)
self._toc = {}
self._last_read = None # Records last time we read cur/new
+ # NOTE: we manually invalidate _last_read each time we do any
+ # modifications ourselves, otherwise we might get tripped up by
+ # bogus mtime behaviour on some systems (see issue #6896).
def add(self, message):
"""Add message and return assigned key."""
@@ -271,11 +274,15 @@
raise
if isinstance(message, MaildirMessage):
os.utime(dest, (os.path.getatime(dest), message.get_date()))
+ # Invalidate cached toc
+ self._last_read = None
return uniq
def remove(self, key):
"""Remove the keyed message; raise KeyError if it doesn't exist."""
os.remove(os.path.join(self._path, self._lookup(key)))
+ # Invalidate cached toc (only on success)
+ self._last_read = None
def discard(self, key):
"""If the keyed message exists, remove it."""
@@ -310,6 +317,8 @@
if isinstance(message, MaildirMessage):
os.utime(new_path, (os.path.getatime(new_path),
message.get_date()))
+ # Invalidate cached toc
+ self._last_read = None
def get_message(self, key):
"""Return a Message representation or raise a KeyError."""
@@ -364,7 +373,9 @@
def flush(self):
"""Write any pending changes to disk."""
- return # Maildir changes are always written immediately.
+ # Maildir changes are always written immediately, so there's nothing
+ # to do except invalidate our cached toc.
+ self._last_read = None
def lock(self):
"""Lock the mailbox."""