[Dovecot] 2.1.5: Panic: file mailbox-list-fs.c: line 156 (fs_list_get_path): assertion failed: (mailbox_list_is_valid_pattern(_list, name))

[Nick Urbanik]

Dear Folks,

We had this assertion failure on Dovecot 2.1.1 on a particular
mailbox.

I upgraded to 2.1.5, and we have the same assertion failure, on the
same mailbox:

Apr 27 16:02:03 imap(nu-imaptest00258 at example.com): Panic: file mailbox-list-fs.c: line 156 (fs_list_get_path): assertion failed: (mailbox_list_is_valid_pattern(_list, name))
Apr 27 16:02:03 imap(nu-imaptest00258 at example.com): Error: Raw backtrace: /usr/lib64/dovecot/libdovecot.so.0(+0x4246a) [0x7f310c28146a] -> /usr/lib64/dovecot/libdovecot.so.0(+0x424b6)
+[0x7f310c2814b6] -> /usr/lib64/dovecot/libdovecot.so.0(+0x1950a) [0x7f310c25850a] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0x889b5) [0x7f310c5539b5] ->
+/usr/lib64/dovecot/lib10_quota_plugin.so(+0x8a30) [0x7f3109ccea30] -> /usr/lib64/dovecot/lib10_quota_plugin.so(+0x8cdf) [0x7f3109ccecdf] -> /usr/lib64/dovecot/lib10_quota_plugin.so(+0x93c8)
+[0x7f3109ccf3c8] -> /usr/lib64/dovecot/lib10_quota_plugin.so(+0x9436) [0x7f3109ccf436] -> /usr/lib64/dovecot/lib10_quota_plugin.so(quota_get_resource+0x72) [0x7f3109cca792] ->
+/usr/lib64/dovecot/lib10_quota_plugin.so(quota_test_alloc+0x1bd) [0x7f3109ccaaed] -> /usr/lib64/dovecot/lib10_quota_plugin.so(+0xa870) [0x7f3109cd0870] ->
+/usr/lib64/dovecot/libdovecot-storage.so.0(mailbox_save_begin+0x4d) [0x7f310c544b9d] -> dovecot/imap [nu-imaptest00258 at example.com 127.0.0.1 APPEND]() [0x408ac4] -> dovecot/imap
+[nu-imaptest00258 at example.com 127.0.0.1 APPEND](cmd_append+0x139) [0x408d69] -> dovecot/imap [nu-imaptest00258 at example.com 127.0.0.1 APPEND](command_exec+0x3d) [0x410aed] -> dovecot/imap
+[nu-imaptest00258 at example.com 127.0.0.1 APPEND]() [0x40fa2e] -> dovecot/imap [nu-imaptest00258 at example.com 127.0.0.1 APPEND]() [0x40fb1a] -> dovecot/imap [nu-imaptest00258 at example.com
+127.0.0.1 APPEND](client_handle_input+0x135) [0x40fd45] -> dovecot/imap [nu-imaptest00258 at example.com 127.0.0.1 APPEND](client_input+0x5f) [0x41066f] ->
+/usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x36) [0x7f310c28d9d6] -> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x9f) [0x7f310c28ea5f] ->
+/usr/lib64/dovecot/libdovecot.so.0(io_loop_run+0x28) [0x7f310c28d978] -> /usr/lib64/dovecot/libdovecot.so.0(master_service_run+0x13) [0x7f310c279c73] -> dovecot/imap [nu-imaptest00258 at example.com
+127.0.0.1 APPEND](main+0x29d) [0x418b3d] -> /lib64/libc.so.6(__libc_start_main+0xfd) [0x7f310bebccdd] -> dovecot/imap [nu-imaptest00258 at example.com 127.0.0.1 APPEND]() [0x408449]
Apr 27 16:02:03 imaptest01 perdition.imap4[15893]: Closing session: 211.29.132.209:42922->211.29.132.245:143 authorisation_id=NONE authentication_id="nu-imaptest00258" received=67 sent=53
Apr 27 16:02:03 imap(nu-imaptest00258 at example.com): Fatal: master: service(imap): child 15894 killed with signal 6 (core not dumped)

Any suggestions welcome.

I guess enabling core dumps is a good start, I'll do that, but has
anyone seen this before?
-- 
Nick Urbanik http://nicku.org 808-71011 nick.urbanik at optusnet.com.au
GPG: 7FFA CDC7 5A77 0558 DC7A 790A 16DF EC5B BB9D 2C24  ID: BB9D2C24
I disclaim, therefore I am.