No offense taken.
LTS is perfectly okay, assuming you prefer stable, reliable, tested software without any updates other than security fixes. Which is a valid choice, even if it isn't my choice.
I was merely explaining how the error came to be possible, despite the LTS promise of reliability.
...
Personally, if I were to run a Ubuntu LTS distro, I would prefer the latest LTS (16.04 currently). Or just the latest stable release.