Undefined offset: 2

[mikshepard]

Steps to reproduce

1. Create External Storage mount (using "Local" mount in my case)
2. Set "Folder name" mountpoint to root "/"
3. Access External Storage folder in Nextcloud

Actual behaviour

Folder contents can be viewed as expected, but logs show error with every access:

Undefined offset: 2 at /var/www/nextcloud/apps/files_external/lib/Lib/Api.php#42

Here is commit for using root as the mountpoint of an External Storage, if it helps.

Server configuration

Operating system:
Debian Jessie

Web server:
Apache 2.4.10

Database:
MySQL 5.7.19

PHP version:
PHP 5.7.19

Nextcloud version: (see Nextcloud admin page)
Nextcloud 12.0.2

Updated from an older Nextcloud/ownCloud or fresh install:
Updated

Where did you install Nextcloud from:
Source tarball

Are you using external storage, if yes which one: local/smb/sftp/...
Local

Are you using encryption: yes/no
No

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
LDAP

Client configuration

Browser:
Opera/Firefox/Vivaldi

Operating system:
Windows 7

Logs

Nextcloud log (data/nextcloud.log)

Nextcloud log

{"reqId":"ZMOJj7hsiolJ3Wochbdo","level":3,"time":"2017-09-01T10:16:09-05:00","remoteAddr":"X.X.X.X","user":"admin","app":"PHP","method":"GET","url":"\/ocs\/v1.php\/apps\/files_external\/api\/v1\/mounts?format=json","message":"Undefined offset: 2 at \/var\/www\/nextcloud\/apps\/files_external\/lib\/Lib\/Api.php#42","userAgent":"Mozilla\/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit\/537.36 (KHTML, like Gecko) Chrome\/60.0.3112.113 Safari\/537.36 Vivaldi\/1.93.947.3","version":"12.0.2.0"}"

[MorrisJobke]

cc @icewind1991

[icewind1991]

@mikshepard can you verify if #6574 fixes the problem for you

[mikshepard]

Yes, applied the patch 24 hours ago, logs are clean. This seems to have resolved the issue. Thank you!!