ACL issue: not able to connect with username that is not defined in aclfile

[elementzonline]

My ACL file contents look like this

`# This affects access control with no username

topic readwrite /mediatronix/anonymous/#`

`# This affects all clients

topic readwrite /test/#`

`# This only affects clients with usename

user testuser123
topic readwrite /test/#`

`# This affects all clients

pattern readwrite /test/%u/#`

///////////////////////////////////
I am able to connect with username testuser123, which is mentioned in the acl file. But when other usernames are used in client, the following error occurs,

Socket error on client , disconnecting.

The same acl is working fine for mosquitto version 1.4.8, but not working for new version 1.4.15.

More info:
Tested with Ubuntu 18.04 and 1.4.15 - Acl issue as mentioned above
Tested with Ubuntu 16.04 and 1.4.8 - ACL working fine

[quonb]

I think it is the same problem that was described in #1162.

[elementzonline]

I think it is the same problem that was described in #1162.

Exactly.
Rectified the issue by installing the mosquitto server from the fixes branch.

For others who experience the same issue use the following commands as a temporary soln

// Use fixes branch from mosquitto repository

git clone https://github.com/eclipse/mosquitto.git
cd mosquitto
git checkout -b origin/fixes
git pull

// Build the source and install
make
sudo make install