Sieve redirect is broken in 2.3.7.2 - signal 11

[Demonhost]

Hi,

If we use sieve redirect under dovecot 2.3.7.2 we end up with

Oct 04 03:30:31 dockerhost docker[12154]: 2019-10-04T03:30:31 
53ac2ae27650 postfix: 0605F207B0F36: to=<xxxx at xxxx.xx>, 
relay=127.0.0.1[127.0.0.1]:10024, delay=1.5, delays=0.36/0/0/1.1, 
dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 
2.0.0 Ok: queued as 6FC89207B0F38)
Oct 04 03:30:31 dockerhost docker[12154]: 2019-10-04T03:30:31 
53ac2ae27650 postfix: 6FC89207B0F38: to=<xxxx at xxxx.xx>, relay=dovecot, 
delay=0.31, delays=0.05/0/0/0.26, dsn=4.3.0, status=deferred (Command 
died with signal 11: "/usr/libexec/dovecot/dovecot-lda")

Using docker with official alpine image.

/ # cat /etc/alpine-release
3.8.4

/ # apk info -v | grep dovecot
WARNING: Ignoring APKINDEX.adfa7ceb.tar.gz: No such file or directory
WARNING: Ignoring APKINDEX.efaa1f73.tar.gz: No such file or directory
dovecot-2.3.7.2-r0
dovecot-fts-solr-2.3.7.2-r0
dovecot-ldap-2.3.7.2-r0
dovecot-pigeonhole-plugin-2.3.7.2-r0
dovecot-pigeonhole-plugin-ldap-2.3.7.2-r0

Sieve rule is:
# rule:[test]
if header :contains "subject" "test"
{
         redirect "testemail at gmail.com";
}

In host's dmesg we found the following:
[213184.882341] traps: dovecot-lda[6128] general protection 
ip:7ff6cf8144f7 sp:7fff5f800b30 error:0 in 
libdovecot.so.0.0.0[7ff6cf724000+360000]

Sorry, not knowledgeable enough on how to do the GBD debug.
-----------------
We went back to previous version and issue disappeared.

8b45bb255b67:/# cat /etc/alpine-release
3.8.4
8b45bb255b67:/# apk info -v | grep dovecot
WARNING: Ignoring APKINDEX.adfa7ceb.tar.gz: No such file or directory
WARNING: Ignoring APKINDEX.efaa1f73.tar.gz: No such file or directory
dovecot-2.3.6-r0
dovecot-fts-solr-2.3.6-r0
dovecot-ldap-2.3.6-r0
dovecot-pigeonhole-plugin-2.3.6-r0
dovecot-pigeonhole-plugin-ldap-2.3.6-r0

Anyone else already had this problem or you know how to fix it?

Thanks in advance.