doveadm expunge didn't clear Trash mailbox

[Sophie Loewenthal]

Hi, 


Why did my 'doveadm expunge' command not clear the Trash out of a mailbox?  

The oldest messages was put into the Trash on the 26th June 2018 as shown in the file timestamp.

-rw------- 1 vmail mail 33056 Jun 26 16:46 1530031582.M768773P18242.mx10,S=33056,W=33510:2,RS


# doveadm -D expunge -u testuser at example.org mailbox Trash savedbefore 2d
Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm
Debug: Skipping module doveadm_acl_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol: acl_lookup_dict_iterate_visible_next (this is usually intentional, so just ignore this message)
Debug: Skipping module doveadm_expire_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_expire_plugin.so: undefined symbol: expire_set_deinit (this is usually intentional, so just ignore this message)
Debug: Skipping module doveadm_quota_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol: quota_user_module (this is usually intentional, so just ignore this message)
Debug: Module loaded: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_sieve_plugin.so
Debug: Skipping module doveadm_fts_lucene_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_lucene_plugin.so: undefined symbol: lucene_index_iter_deinit (this is usually intentional, so just ignore this message)
Debug: Skipping module doveadm_fts_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol: fts_user_get_language_list (this is usually intentional, so just ignore this message)
Debug: Skipping module doveadm_mail_crypt_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/libdoveadm_mail_crypt_plugin.so: undefined symbol: mail_crypt_box_get_pvt_digests (this is usually intentional, so just ignore this message)
doveadm(testuser at example.org): Debug: Added userdb setting: mail=maildir:/var/vmail/example.org/testuser at example.org
doveadm(testuser at example.org): Debug: Added userdb setting: plugin/quota=dirsize:storage=
doveadm(testuser at example.org): Debug: Effective uid=150, gid=8, home=/var/vmail/example.org/testuser at example.org
doveadm(testuser at example.org): Debug: Namespace inbox: type=private, prefix=, sep=, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:/var/vmail/example.org/testuser at example.org
doveadm(testuser at example.org): Debug: maildir++: root=/var/vmail/example.org/testuser at example.org, index=, indexpvt=, control=, inbox=/var/vmail/example.org/testuser at example.org, alt=

Sophie