Hello and thank you for filing this bug report. Unfortunately, 15.04 has gone EOL and src:mysql-5.6 has been replaced src:mysql-5.7 in 16.04. Are you able to reproduce this with a current release and packages.
Hello and thank you for filing this bug report. Unfortunately, 15.04 has gone EOL and src:mysql-5.6 has been replaced src:mysql-5.7 in 16.04. Are you able to reproduce this with a current release and packages.