[Dovecot] imap-login killed with signal 11 in Dovecot 2.2.13 (feea8645c4d7)

Latest 2.2.13 HG feea8645c4d7 seems to unexpectedly kill imap-login sessions:

Jun 7 11:56:10 nihlus dovecot: imap(tlx@leuxner.net): Disconnected: Logged out in=2203 out=851225 Jun 7 11:56:10 nihlus dovecot: imap(tlx@leuxner.net): Disconnected: Logged out in=316 out=2417 Jun 7 11:56:10 nihlus dovecot: imap-login: Fatal: master: service(imap-login): child 60505 killed with signal 11 (core not dumped - add -D parameter to service imap-login { executable } Jun 7 11:56:10 nihlus dovecot: imap-login: Fatal: master: service(imap-login): child 60595 killed with signal 11 (core not dumped - add -D parameter to service imap-login { executable }

Adding the -D parameter does not generate a core dump however...