Crash when setting quota = count:User quota

[Tom Sommer]

Actually it also happens with just "quota_vsizes = true"

Mar 19 17:37:55 lmtp(xxx at xxx.xx): Panic: file file-lock.c: line 269: 
unreached
Mar 19 17:37:55 lmtp(xxx at xxxx.xxx): Error: Raw backtrace: 
/usr/lib/dovecot/libdovecot.so.0 [0x35f647e07a] -> 
/usr/lib/dovecot/libdovecot.so.0 [0x35f647e0e6] -> 
/usr/lib/dovecot/libdovecot.so.0 [0x35f647d4ac] -> 
/usr/lib/dovecot/libdovecot.so.0 [0x35f6481edf] -> 
/usr/lib/dovecot/libdovecot.so.0(file_wait_lock_error+0x3a) 
[0x35f648205a] -> 
/usr/lib/dovecot/libdovecot.so.0(file_try_lock_error+0x13) 
[0x35f6482123] -> 
/usr/lib/dovecot/libdovecot.so.0(file_create_locked+0x284) 
[0x35f647f7a4] -> /usr/lib/dovecot/libdovecot-storage.so.0 
[0x35f6068ec4] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(index_mailbox_vsize_update_wait_lock+0xe) 
[0x35f6068f2e] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(index_mailbox_get_virtual_size+0x3d) 
[0x35f606919d] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(index_mailbox_get_metadata+0x321) 
[0x35f606fcd1] -> /usr/lib/dovecot/libdovecot-storage.so.0 
[0x35f60485a0] -> /usr/lib/dovecot/libdovecot-storage.so.0 
[0x35f60593ce] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_metadata+0x6e) 
[0x35f603404e] -> 
/usr/lib/dovecot/lib10_quota_plugin.so(quota_count+0xe7) 
[0x2b3e7464c417] -> /usr/lib/dovecot/lib10_quota_plugin.so 
[0x2b3e7464d89d] -> /usr/lib/dovecot/lib10_quota_plugin.so 
[0x2b3e7464dba5] -> 
/usr/lib/dovecot/lib10_quota_plugin.so(quota_get_resource+0x77) 
[0x2b3e7464a4b7] -> 
/usr/lib/dovecot/lib10_quota_plugin.so(quota_test_alloc+0x191) 
[0x2b3e7464a8f1] -> /usr/lib/dovecot/lib10_quota_plugin.so 
[0x2b3e746505f5] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(mailbox_save_begin+0x5e) 
[0x35f6032eae] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(mail_storage_copy+0x66) 
[0x35f602ac26] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(maildir_copy+0x56) 
[0x35f60435d6] -> /usr/lib/dovecot/lib10_quota_plugin.so 
[0x2b3e7465071d] -> 
/usr/lib/dovecot/libdovecot-storage.so.0(mailbox_copy+0x7a) 
[0x35f6032cea] -> 
/usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver_save+0x1ba) 
[0x35f680813a] -> 
/usr/lib/dovecot/libdovecot-lda.so.0(mail_deliver+0xf3) [0x35f68084c3] 
-> dovecot/lmtp [DATA 172.17.165.5 xxxx at xxxx.xx] [0x40645c]

// Tom