[diftraku]

I share some of your pain. We use Lua 5.1 on our embedded platform and at one point did development on 5.2.

There's a lot of (seemingly) undocumented changes, even between two minor versions that make you question the semver (and your sanity) at times.

For example, the patterns operate just different enough between the two minors, that I had to resort to dumping everything into JSON and back since that was the only way that one odd case worked similarly between the two versions (albeit sharing the same JSON library).

In regards to the new version, coworker of mine glanced at the 5.4 changelog and could not make out how things had changed, only the fact that they had been changed.

[daurnimator]

Lua does not follow semver (it never has, and has been around longer than semver)