2.0.beta6 assert-fails for me when:

• using mdbox (maildir is OK)
• my authentication module returns the mail= and mail_location= attributes (relying on mail_location from 10-mail.conf is OK)
• a user logs in for the first time and selects his nonexistent INBOX

The error is: Panic: file mailbox-list.c: line 318 (mailbox_list_get_unexpanded_path): assertion failed: (*location == '0')

The location string is "1mdbox:/Volumes/Mail/joe".

This did not happen with beta5.

Backtrace: 0 __kill + 10 1 abort + 90 2 default_fatal_finish + 68 3 i_internal_error_handler + 0 4 i_debug + 0 5 mailbox_list_get_unexpanded_path + 111 6 mailbox_list_mkdir + 70 7 mdbox_map_open_internal + 169 8 mdbox_map_open_or_create + 14 9 mdbox_write_index_header + 51 10 mdbox_mailbox_create_indexes + 27 11 dbox_mailbox_create + 155 12 mailbox_open_full + 267 13 cmd_select_full + 1856 (cmd-select.c:287) 14 cmd_select + 11 (cmd-select.c:430) 15 client_command_input + 36 (imap-client.c:672) 16 client_command_input + 416 (imap-client.c:737) 17 client_handle_input + 134 (imap-client.c:778) 18 client_input + 118 (imap-client.c:829) 19 io_loop_handler_run + 234 20 io_loop_run + 56 21 master_service_run + 27 22 main + 689 (main.c:360) 23 start + 52