[Dovecot] Found bug on doing IMAP search with UTF8 chars

[Weinreich, Nico]

Hi!
 
I'm using Roundcube 0.9git as mail frontend and have installed Dovecot 2.1.7 on Debian Squeeze. When searching for mail via Roundcube and the keyword contains "special" chars (like german umlauts), then Dovecot seems to die when the folder does not contain a message which contains this keyword, i.e.
 
folder contains message /w subject "Dies ist eine Nachricht" => search for "Nachricht" => Roundcube shows that messages
folder contains message /w subject "Dies ist eine Nachricht" => search for "Nachricht123" => Roundcube shows error that no messages where found
folder contains message /w subject "Auflösung der Frage" => search for "Lösung" => Roundcube shows that messages 
folder contains message /w subject "Auflösung der Frage" => search for "Lösung123" => Roundcube shows error saying: "Connection to storage server failed"
 
Looking into /var/log/mail.log shows:
 
Sep  5 11:43:32 mail dovecot: imap(abc at def.de): Panic: search key not utf8: L.sung123 dsr_sub_allocation
Sep  5 11:43:32 mail dovecot: imap(abc at def.de): Error: Raw backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x4478a) [0
x7f065ba8e78a] -> /usr/lib/dovecot/libdovecot.so.0(+0x447d6) [0x7f065ba8e7d6] -> /usr/lib/dovecot/libdovecot.so.0(i_error+0) [0x7f065ba655ef
] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x9a3cb) [0x7f065bd6f3cb] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x9a8aa) [0x7f065bd6f8
aa] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x78641) [0x7f065bd4d641] -> /usr/lib/dovecot/libdovecot-storage.so.0(mail_search_args_fore
ach+0x3c) [0x7f065bd4d7bc] -> /usr/lib/dovecot/libdovecot.so.0(message_parse_header+0x29) [0x7f065ba78eb9] -> /usr/lib/dovecot/libdovecot-st
orage.so.0(+0x9a0cf) [0x7f065bd6f0cf] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0x9b160) [0x7f065bd70160] -> /usr/lib/dovecot/libdovecot-
storage.so.0(index_storage_search_next_nonblock+0x48) [0x7f065bd706e8] -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_search_next_nonbl
ock+0x27) [0x7f065bd51a07] -> dovecot/imap() [0x41668f] -> dovecot/imap(imap_search_start+0xd8) [0x416ad8] -> dovecot/imap(cmd_sort+0x1e6) [
0x40e636] -> dovecot/imap(command_exec+0x3d) [0x41157d] -> dovecot/imap() [0x4104fe] -> dovecot/imap(client_handle_input+0x135) [0x410805] -
> dovecot/imap(client_input+0x5f) [0x41112f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f065ba9a926] -> /usr/lib/dovecot/
libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f065ba9b95f] -> /usr/lib/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f065ba9a8c8] -> /usr/li
b/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f065ba87053] -> dovecot/imap(main+0x2a4) [0x419354] -> /lib/libc.so.6(__libc_start_ma
in+0xfd) [0x7f065b706c8d] -> dovecot/imap() [0x408e79]

 
Huh? This error only occurs when I search for a keyword, that contains probably non-ASCII-US chars (like umlauts, euro sign EUR ...) and no message was found in that folder. When there is any message which contains this keyword, then Roundcube is fine and there error above cannot be found in mail.log. Can anybody confirm this behaviour?
 
Regards