Hi,
another backtrace:
dovecot-virtual:
INBOX INBOX.Some.Folder.* KEYWORD $MAILING
Core was generated by `imap'. Program terminated with signal 6, Aborted. [New process 20853] #0 0xb7fbe556 in raise () from /lib/libc.so.6 (gdb) bt #0 0xb7fbe556 in raise () from /lib/libc.so.6 #1 0xb7fbfd78 in abort () from /lib/libc.so.6 #2 0x080ee9a5 in default_fatal_finish (type=<value optimized out>, status=0) at failures.c:161 #3 0x080eea12 in i_internal_fatal_handler (type=LOG_TYPE_PANIC, status=0, fmt=0x810632c "file %s: line %d (%s): assertion failed: (%s)", args=0xbf9f6b54 "\002") at failures.c:441 #4 0x080ee399 in i_panic (format=0x810632c "file %s: line %d (%s): assertion failed: (%s)") at failures.c:208 #5 0x080b1def in mail_search_args_init_sub (args=0x9eee200, arg=0x9eee220, change_uidsets=false, search_saved_uidset=0x0) at mail-search.c:86 #6 0xb7f8f7e3 in virtual_storage_sync_init (box=0x9eea188, flags=65) at virtual-sync.c:451 #7 0x080b3b12 in mailbox_sync (box=0x5175, flags=65, status_items=239, status_r=0xbf9f6e88) at mail-storage.c:574 #8 0x08064708 in cmd_select_full (cmd=0x9ee19f8, readonly=false) at cmd-select.c:273 #9 0x08064e69 in cmd_select (cmd=0x9ee19f8) at cmd-select.c:388 #10 0x0806700c in client_command_input (cmd=0x9ee19f8) at client.c:603 #11 0x080670a9 in client_command_input (cmd=0x9ee19f8) at client.c:652 #12 0x080676ed in client_handle_input (client=0x9ee1768) at client.c:693 #13 0x08067ba3 in client_input (client=0x9ee1768) at client.c:748 #14 0x080f73a0 in io_loop_handler_run (ioloop=0x9edd9b0) at ioloop-epoll.c:208 #15 0x080f6830 in io_loop_run (ioloop=0x9edd9b0) at ioloop.c:338 #16 0x080704c5 in main (argc=Cannot access memory at address 0x5175) at main.c:320
regards,
matthias