This is from the June 16 CVS, it also happens with June 15 but not with June 8.
Basically, imap segfaults when opening my mbox. Some details are below:
Core was generated by `imap'. Program terminated with signal 11, Segmentation fault.
#0 0x08094e5c in message_parse_header_next (ctx=0x80c8e10, hdr_r=0xbffff64c) at message-parser.c:755 755 if (msg[0] == '\n' ||
(gdb) bt full #0 0x08094e5c in message_parse_header_next (ctx=0x80c8e10, hdr_r=0xbffff64c) at message-parser.c:755 msg = (const unsigned char *) 0x0 i = Variable "i" is not available.
(gdb) p *ctx $1 = {line = {name = 0x0, name_len = 0, value = 0x0, value_len = 0, full_value = 0x0, full_value_len = 0, middle = 0x0, middle_len = 0, name_offset = 14794827, full_value_offset = 0, continues = 0, continued = 0, eoh = 0, no_newline = 0, use_full_value = 0}, input = 0x80c9cfc, hdr_size = 0x0, name = 0x80cf030, value_buf = 0x0, skip = 0, skip_initial_lwsp = 0, has_nuls = 0}
(gdb) p *hdr_r $2 = (struct message_header_line *) 0x0
(gdb) bt #0 0x08094e5c in message_parse_header_next (ctx=0x80c8e10, hdr_r=0xbffff64c) at message-parser.c:755 #1 0x0806bfaf in mbox_sync_parse_match_mail (mbox=0x80c3ba8, view=0x80c8ea8, seq=2028) at mbox-sync-parse.c:521 #2 0x080689d0 in mbox_file_seek (mbox=0x80c3ba8, view=0x80c8ea8, seq=2028, deleted_r=0xbffff748) at mbox-file.c:164 #3 0x0806a91f in mbox_mail_seek (mail=0x80c9200) at mbox-mail.c:63 #4 0x0806ab2a in mbox_mail_get_stream (_mail=0x80c9200, hdr_size=0x0, body_size=0x0) at mbox-mail.c:176 #5 0x0808cc55 in mail_get_stream (mail=0xfffffffe, hdr_size=0x0, body_size=0x0) at mail.c:106 #6 0x080760ef in index_mail_get_header_stream (_mail=0x80c9200, _headers=0x80c95d8) at index-mail-headers.c:606 #7 0x0808cc31 in mail_get_header_stream (mail=0xfffffffe, headers=0x80c95d8) at mail.c:97 #8 0x080769d0 in index_storage_search_next (_ctx=0x80c9188, mail=0x80c9200) at index-search.c:492 #9 0x0808d525 in mailbox_search_next (ctx=0x0, mail=0x80c9200) at mail-storage.c:405 #10 0x08057bee in cmd_search (cmd=0x80bcb98) at cmd-search.c:33 #11 0x080594f5 in _client_input (context=0x80bcb58) at client.c:334 #12 0x0809e1ca in io_loop_handler_run (ioloop=0x80bb9b0) at ioloop-poll.c:184 #13 0x0809d8e9 in io_loop_run (ioloop=0x80bb9b0) at ioloop.c:218 #14 0x080603e7 in main (argc=1, argv=0xbffffa44, envp=0xbffffa4c) at main.c:228