v2.2.36 to v2.3.8 maildirlock bug

[lty at cndns.com]

Dear all, 
  Dovecot upgraded from v2.2.36 to v2.3.8 There is no problem with the
configuration, but the lock directory seems to have an error.

[root at spam dovecot]# /usr/libexec/dovecot/maildirlock /path/to/maildir 1
Panic: BUG: No IOs or timeouts set. Not waiting for infinity.
19276[root at spam dovecot]# Error: Raw backtrace:
/usr/lib64/dovecot/libdovecot.so.0(+0xe227a) [0x7f1cb567a27a] ->
/usr/lib64/dovecot/libdovecot.so.0(+0xe2321) [0x7f1cb567a321] ->
/usr/lib64/dovecot/libdovecot.so.0(+0x40f31) [0x7f1cb55d8f31] ->
/usr/lib64/dovecot/libdovecot.so.0(+0xf93b4) [>xrf1cb56913b4] -> /usr/
Lib64/dovecot/libdovecot.so.0(io_loop_handler_run_internal+0x28)
[0x7f1cb5693918] ->
/usr/lib64/dovecot/libdovecot.so.0(io_loop_handler_run+0x5c)
[0x7f1cb5691aac] -> /usr/lib64/dovecot/libdovecot.
So.0(io_loop_run+0x38) [0x7f1cb5691cc8] ->
/usr/libexec/dovecot/maildirlock(main+0x242) [0x7f1cb5b522c2] ->
/lib64/libc.so.6(__libc_start_main+0x100) [0x7f1cb5222d20] -> /
Usr/libexec/dovecot/maildirlock(+0xfa9) [0x7f1cb5b51fa9]

After google seems to be a bug, this is the address
Https://bugs.gentoo.org/682498

If this is not fixed, we are temporarily unable to upgrade to use the
new version. Will the next version be fixed? We are looking forward to
seeing that we have returned v2.2.36
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