panic when using dovecot master account

[André Rodier]

Hello,

I am running dovecot 2.2.34 (874deae), on Debian stable, from backports.

I just tried the master account, and although everything worked in the 
email client, I had logs in the error logs:


> imap(mirina): Panic: file mail-index-sync.c: line 413 
> (mail_index_sync_begin_to2): assertion failed: (!index->syncing)
> Nov 08 22:06:24 osaka dovecot[1450]: imap(mirina): Error: Raw 
> backtrace: /usr/lib/dovecot/libdovecot.so.0(+0x9e412) [0x7f20ae813412] 
> -> /usr/lib/dovecot/libdovecot.so.0(+0x9e50d) [0x7f20ae81350d] -> 
> /usr/lib/dovecot/libdovecot.so.0(i_fatal+0) [0x7f20ae7a2c51] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(+0xe0fe4) [0x7f20aeb88fe4] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_begin_to+0x4f) 
> [0x7f20aeb890bf] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mail_index_sync_begin+0x1c) 
> [0x7f20aeb8915c] -> 
> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(virtual_storage_sync_init+0x218) 
> [0x7f20ad51f308] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x44) 
> [0x7f20aeaf02d4] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync+0x37) 
> [0x7f20aeaf0387] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_get_status+0x31) 
> [0x7f20aeb6bbf1] -> 
> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(+0x936d) 
> [0x7f20ad51c36d] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xa8771) 
> [0x7f20aeb50771] -> 
> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0xfd46) [0x7f20adb8bd46] 
> -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x31) 
> [0x7f20aeaf0781] -> 
> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(virtual_storage_sync_init+0x10b8) 
> [0x7f20ad5201a8] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x44) 
> [0x7f20aeaf02d4] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync+0x37) 
> [0x7f20aeaf0387] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(index_storage_get_status+0x31) 
> [0x7f20aeb6bbf1] -> 
> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(+0x936d) 
> [0x7f20ad51c36d] -> /usr/lib/dovecot/libdovecot-storage.so.0(+0xa8771) 
> [0x7f20aeb50771] -> 
> /usr/lib/dovecot/modules/lib20_fts_plugin.so(+0xfd46) [0x7f20adb8bd46] 
> -> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_get_status+0x31) 
> [0x7f20aeaf0781] -> 
> /usr/lib/dovecot/modules/lib20_virtual_plugin.so(virtual_storage_sync_init+0x10b8) 
> [0x7f20ad5201a8] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync_init+0x44) 
> [0x7f20aeaf02d4] -> 
> /usr/lib/dovecot/libdovecot-storage.so.0(mailbox_sync+0x37) 
> [0x7f20aeaf0387] -> dovecot/imap(cmd_select_full+0x16b) 
> [0x557de970cc3b] -> dovecot/imap(command_exec+0x5c) [0x557de971444c] -> 
> dovecot/imap(+0x1a912) [0x557de9712912]
> Nov 08 22:06:24 osaka dovecot[1450]: imap(mirina): Fatal: master: 
> service(imap): child 4289 killed with signal 6 (core dumps disabled)

I attach my dovecot configuration too.

Thanks for your help.

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