.lock files show up in directory listings

This bug is hard to reproduce timing-wise, but I have received at least one directory listing containing a .lock file.

For reference, this is what it looked like:

@prefix : <#>.
@prefix inbox: <>.
@prefix ldp: <http://www.w3.org/ns/ldp#>.
@prefix terms: <http://purl.org/dc/terms/>.
@prefix XML: <http://www.w3.org/2001/XMLSchema#>.
@prefix dcd: <dcd04010-0722-11eb-aaa1-f5587892eb36.ttl.lock/>.
@prefix st: <http://www.w3.org/ns/posix/stat#>.
@prefix tur: <http://www.w3.org/ns/iana/media-types/text/turtle#>.

inbox:
    a ldp:BasicContainer, ldp:Container;
    terms:modified "2020-10-05T19:22:19Z"^^XML:dateTime;
    ldp:contains
        <378f8150-0728-11eb-aaa1-f5587892eb36.ttl>,
        <4870d3e0-073f-11eb-aaa1-f5587892eb36.ttl>,
        <92f0e640-073e-11eb-aaa1-f5587892eb36.ttl>,
        <abf84aa0-0731-11eb-aaa1-f5587892eb36.ttl>,
        <dcd04010-0722-11eb-aaa1-f5587892eb36.ttl>, dcd:;
    st:mtime 1601925739.707;
    st:size 4096.
<378f8150-0728-11eb-aaa1-f5587892eb36.ttl>
    a tur:Resource, ldp:Resource;
    terms:modified "2020-10-05T16:31:27Z"^^XML:dateTime;
    st:mtime 1601915487.715;
    st:size 531.
<4870d3e0-073f-11eb-aaa1-f5587892eb36.ttl>
    a tur:Resource, ldp:Resource;
    terms:modified "2020-10-05T19:16:34Z"^^XML:dateTime;
    st:mtime 1601925394.459;
    st:size 552.
<92f0e640-073e-11eb-aaa1-f5587892eb36.ttl>
    a tur:Resource, ldp:Resource;
    terms:modified "2020-10-05T19:11:29Z"^^XML:dateTime;
    st:mtime 1601925089.955;
    st:size 552.
<abf84aa0-0731-11eb-aaa1-f5587892eb36.ttl>
    a tur:Resource, ldp:Resource;
    terms:modified "2020-10-05T17:39:08Z"^^XML:dateTime;
    st:mtime 1601919548.486;
    st:size 531.
<dcd04010-0722-11eb-aaa1-f5587892eb36.ttl>
    a tur:Resource, ldp:Resource;
    terms:modified "2020-10-05T15:53:07Z"^^XML:dateTime;
    st:mtime 1601913187.983;
    st:size 531.
dcd:
    a ldp:BasicContainer, ldp:Container, ldp:Resource;
    terms:modified "2020-10-05T19:22:19Z"^^XML:dateTime;
    st:mtime 1601925739.711;
    st:size 4096.

Note how it ends with .lock/ as opposed to just .lock, which might be the reason why it is not caught.

Should be fixed when not using on-disk locking anymore (#1475), but wanted to mention this in case there would be issues with other magic extensions.

Im Issue sind keine Quelldateien oder Tests angegeben. Beginne damit, das Verhalten der Verzeichnisauflistung und die in #1475 referenzierte Arbeit am On-Disk-Locking zu untersuchen, und verwende dann die gemeldete Turtle-Auflistung als Reproduktionsziel. Erledigt ist die Aufgabe, wenn temporäre .lock-Einträge nicht mehr in Auflistungen erscheinen, während reguläre Ressourcen weiterhin vorhanden sind.