From 7f7a29ef79915a86d3f5bd3533e3a49ac6f36cb6 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Thu, 30 Jul 2015 01:26:16 +0200
Subject: [PATCH] Don't try to rename children of mailboxes with \NoInferiors
 or \HasNoChildren attribute.

---
 lib/Net/IMAP/Sync.pm | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/lib/Net/IMAP/Sync.pm b/lib/Net/IMAP/Sync.pm
index 509ad5b..2a25720 100644
--- a/lib/Net/IMAP/Sync.pm
+++ b/lib/Net/IMAP/Sync.pm
@@ -539,14 +539,18 @@ sub delete($$;$) {
 #   RENAME the mailbox $oldname to $newname.
 #   If $try is set, print a warning but don't crash if the command fails.
 #   /!\ Requires a LIST command to be issued to determine the hierarchy
-#       delimiter for the original name.
+#       delimiter and the mailbox attributes for the original name.
 sub rename($$$;$) {
     my ($self, $from, $to, $try) = @_;
-    my $delim = $self->{_CACHE}->{$from}->{DELIMITER} if defined $self->{_CACHE}->{$from};
+    my ($delim, @attrs);
+    if ($self->{_CACHE}->{$from}) {
+        $delim = $self->{_CACHE}->{$from}->{DELIMITER};
+        @attrs = @{$self->{_CACHE}->{$from}->{LIST_ATTRIBUTES} // []};
+    }
     my $r = $self->_send("RENAME ".quote($from).' '.quote($to));
     $self->{_CACHE}->{$to}  = delete $self->{_CACHE}->{$from}  if exists $self->{_CACHE}->{$from};
     $self->{_PCACHE}->{$to} = delete $self->{_PCACHE}->{$from} if exists $self->{_PCACHE}->{$from};
-    if (defined $delim) {
+    if (defined $delim and !grep {lc $_ eq lc '\NoInferiors' or lc $_ eq lc '\HasNoChildren'} @attrs) {
         # on non-flat mailboxes, move children as well (cf 3501)
         foreach my $c1 (grep /\A\Q$from$delim\E/, keys %{$self->{_CACHE}}) {
             my $c2 = $c1 =~ s/\A\Q$from$delim\E/$to$delim/r;
@@ -1484,15 +1488,16 @@ sub _resp($$;$$$) {
             $callback->(split(/ /, ($1 =~ s/^ //r))) if defined $callback and $cmd eq 'SEARCH';
         }
         elsif (s/\ALIST \((\\?$RE_ATOM_CHAR+(?: \\?$RE_ATOM_CHAR+)*)?\) ("(?:\\[\x22\x5C]|[\x01-\x09\x0B\x0C\x0E-\x21\x23-\x5B\x5D-\x7F])"|NIL) //) {
-            my ($delim, $flags) = ($2, $1);
-            my @flags = defined $flags ? split(/ /, $flags) : ();
+            my ($delim, $attrs) = ($2, $1);
+            my @attrs = defined $attrs ? split(/ /, $attrs) : ();
             my $mailbox = $self->_astring(\$_);
             $self->panic($_) unless $_ eq '';
             $mailbox = 'INBOX' if uc $mailbox eq 'INBOX'; # INBOX is case-insensitive
             undef $delim if uc $delim eq 'NIL';
             $delim =~ s/\A"(.*)"\Z/$1/ if defined $delim;
             $self->_update_cache_for($mailbox, DELIMITER => $delim);
-            $callback->($mailbox, $delim, @flags) if defined $callback and $cmd eq 'LIST';
+            $self->_update_cache_for($mailbox, LIST_ATTRIBUTES => \@attrs);
+            $callback->($mailbox, $delim, @attrs) if defined $callback and $cmd eq 'LIST';
         }
         elsif (s/\ASTATUS //) {
             my $mailbox = $self->_astring(\$_);
-- 
2.39.2