Arch Linux

Description:
Last good version: 2.3.8-x
First bad version: 2.3.9-1

When loading the push notification plugin it crashes when events are triggered.

Coredump:
Reading symbols from /usr/lib/dovecot/imap...
(No debugging symbols found in /usr/lib/dovecot/imap)
[New LWP 19135]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `dovecot/imap'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x00006db7d1439225 in ?? () from /usr/lib/dovecot/modules/lib20_push_notification_plugin.so
/usr/lib/../share/gcc-9.2.0/python/libstdcxx/v6/xmethods.py:731: SyntaxWarning: list indices must be integers or slices, not str; perhaps you missed a comma?
refcounts = ['_M_refcount']['_M_pi']
(gdb) where
#0 0x00006db7d1439225 in ?? () from /usr/lib/dovecot/modules/lib20_push_notification_plugin.so
#1 0x00006db7d14396e4 in push_notification_message_fill () from /usr/lib/dovecot/modules/lib20_push_notification_plugin.so
#2 0x00006db7d1438d5f in ?? () from /usr/lib/dovecot/modules/lib20_push_notification_plugin.so
#3 0x00006db7d143aaf5 in push_notification_trigger_msg_save_append ()
from /usr/lib/dovecot/modules/lib20_push_notification_plugin.so
#4 0x00006db7d165e412 in notify_contexts_mail_copy () from /usr/lib/dovecot/modules/lib15_notify_plugin.so
#5 0x00006db7d165f67f in ?? () from /usr/lib/dovecot/modules/lib15_notify_plugin.so
#6 0x00006db7d188414c in ?? () from /usr/lib/dovecot/libdovecot-storage.so.0
#7 0x00006db7d18842a1 in mailbox_move () from /usr/lib/dovecot/libdovecot-storage.so.0
#8 0x00000b713e413cac in ?? ()
#9 0x00000b713e424000 in command_exec ()
#10 0x00000b713e421f5b in ?? ()
#11 0x00000b713e422008 in ?? ()
#12 0x00000b713e422475 in client_handle_input ()
#13 0x00000b713e4229de in client_input ()
#14 0x00006db7d177d27d in io_loop_call_io () from /usr/lib/dovecot/libdovecot.so.0
#15 0x00006db7d177ec0c in io_loop_handler_run_internal () from /usr/lib/dovecot/libdovecot.so.0
#16 0x00006db7d177d347 in io_loop_handler_run () from /usr/lib/dovecot/libdovecot.so.0
#17 0x00006db7d177d4e8 in io_loop_run () from /usr/lib/dovecot/libdovecot.so.0
#18 0x00006db7d16e751a in master_service_run () from /usr/lib/dovecot/libdovecot.so.0
#19 0x00000b713e411a23 in main ()