From the string.dump documentation at http://luajit.org/extensions.html:
Bytecode stays compatible for dot releases (x.y.0 → x.y.1), but may change
with major or minor releases (2.0 → 2.1) or between any beta release.
For example, is 2.0.1 bytecode the same as 2.0.2 bytecode and so on? Can I
rely on this?