dovecot - Jul 2018 - LMTP crashing heavily for my 2.2.36 installation (and now with 2.3.2.1)

Hi,

I will try to create a coredump later but now I see version 2.3.2.1 also
crashing in LMTP :-(

2018-07-12T10:09:57.336062+02:00 saruman dovecot:
lmtp(an007498)<11814><zrPDEdUMR1smLgAAQ/KzDw>: Fatal: master:
service(lmtp): child 11814 killed with signal 6 (core dumps disabled -
https://dovecot.org/bugreport.html#coredumps)
2018-07-12T10:09:57.382925+02:00 saruman dovecot:
lmtp(an007498)<11819><fqw2E9UMR1srLgAAQ/KzDw>: Panic: file
imap-bodystructure.c: line 116 (part_write_body_multipart): assertion
failed: (part->data != NULL)
2018-07-12T10:09:57.383835+02:00 saruman dovecot:
lmtp(an007498)<11819><fqw2E9UMR1srLgAAQ/KzDw>: Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0(+0xc9e06) [0x7ff42cac0e06] ->
/usr/lib64/dovecot/libdovecot.so.0(+0xc9ebe) [0x7ff42cac0ebe] ->
/usr/lib64/dovecot/libdovecot.so.0(i_fatal+0) [0x7ff42ca35813] ->
/usr/lib64/dovecot/libdovecot.so.0(imap_bodystructure_write+0x3b1)
[0x7ff42ca95f81] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbd397)
[0x7ff42ce2b397] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xc005c)
[0x7ff42ce2e05c] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(index_mail_get_special+0x20d)
[0x7ff42ce2e4cd] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_get_special+0xd)
[0x7ff42cdb0b6d] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_set_attachment_keywords+0x162)
[0x7ff42cdb0f42] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbdd25)
[0x7ff42ce2bd25] -> /usr/lib64/dovecot/libdovecot-storage.so.0(+0xbe10b)
[0x7ff42ce2c10b] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(index_mail_get_parts+0x60)
[0x7ff42ce2dcd0] ->
/usr/lib64/dovecot/libdovecot-storage.so.0(mail_get_parts+0x28)
[0x7ff42cdb04d8] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(+0x2f11e)
[0x7ff4285e611e] ->
/usr/lib64/dovecot/libdovecot-sieve.so.0(sieve_message_body_get_text+0x38)
[0x7ff4285e76a8] ->
/usr/lib64/dovecot/libdovecot-sieve.so.0(ext_body_get_part_list+0x47)
[0x7ff42861b187] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(+0x648d2)
[0x7ff42861b8d2] ->
/usr/lib64/dovecot/libdovecot-sieve.so.0(sieve_interpreter_continue+0x71)
[0x7ff4285f8611] ->
/usr/lib64/dovecot/libdovecot-sieve.so.0(sieve_interpreter_run+0x2b)
[0x7ff4285f886b] -> /usr/lib64/dovecot/libdovecot-sieve.so.0(+0x53fb2)
[0x7ff42860afb2] ->
/usr/lib64/dovecot/libdovecot-sieve.so.0(sieve_multiscript_run+0x38)
[0x7ff42860bd28] ->
/usr/lib64/dovecot/modules/lib90_sieve_plugin.so(+0x3907) [0x7ff428873907]
-> /usr/lib64/dovecot/libdovecot-lda.so.0(mail_deliver+0xdc)
[0x7ff42d0c41cc] -> dovecot/lmtp(lmtp_local_data+0x6eb) [0x55d90309e95b]
->
dovecot/lmtp(cmd_data_continue+0x23d) [0x55d90309d4ed] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x507f0) [0x7ff42ca477f0] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_call_io+0x55) [0x7ff42cad7b35]
-> /usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0xe7)
[0x7ff42cad9307]

I'm still on maildir and my current setting about attachments is:
mail_attachment_detection_options = add-flags-on-save exclude-inlined


Wolfgang
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