sis deduplication broken from 2.2.16 upwards

[Charles Marcus]

On 3/9/2016 9:02 PM, Timo Sirainen <tss at iki.fi> wrote:
> On 08 Mar 2016, at 01:50, Pavel Stano <stanojr at websupport.sk> wrote:
>>
>> sis attachment deduplication is broken in 2.2.16 upwards.
>> It is caused by this commit.
>> https://github.com/dovecot/core/commit/664bf3e236c214aee86294483c379e4fa66c2e63
>>
>> in src/lib-fs/fs-sis.c function fs_sis_try_link() is comparation of
>> inodes of hash files.
>> Because fs_stat() after that commit use fstat() on open fd of temporary
>> file instead of stat on filename. But that temporary file has differnt
>> inode.
>>
>> It not cause any corruption but it will not save any space.
>> Because every duplicate attachment will be in separate file.
> Thanks, fixed: https://github.com/dovecot/core/commit/3b39022ea0513363241cf852b7d454c841584ea1

So, after the fix is applied, does dovecot silently delete the
duplicated files, or is there a command that needs to be run manually?