Greetings.

Just stumbled upon this:

# md5sum ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3
\d41d8cd98f00b204e9800998ecf8427e  ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3

# cp ./Development/rss/rss/STAGING/BATTITI_del_27_11_2016_-_Battiti_Live:_Arsene_Duevi\\Roberto_Zanisi.mp3 /tmp/qlo
# md5sum /tmp/qlo
d41d8cd98f00b204e9800998ecf8427e  /tmp/qlo

IE, in the first instance a '\' character is prepended to the output. The file itself is an empty file, so I guess the file content is irrelevant to the apparent bug.

Running coreutils-8.31-6.fc30.x86_64 on Linux 5.6.13-100.fc30.x86_64+debug

To communicate, cc me, as I am not a ML subscriber.

Cheers,

-- 
Alessandro Forghieri
Nouvelle s.r.l.
via Giardini 456/C 41124 Modena  (ITALY)
tel. +39 059 2929338 - Fax +39 059 347606