[Karellen]

> > > such as MacOS, that are fully compliant with the POSIX standard

> > Until you have to gets your hands dirty and find small and bigger faults everywhere. For example, /bin/sh [...] doesn't work properly in these two parameter expansion cases:

> It’s irrelevant. Neither POSIX nor the UNIX certification [...] requires a recent GNU userland

Is it irrelevant?

If an implementation passes the conformance test suite, but is buggy according to the text of the spec in a way that is not caught by the test suite, can one really say it's "fully compliant with the POSIX standard"?

Is it the test suite that's the final arbiter of the POSIX standard, or is the text of the spec? Because I thought that the point of having a written spec, ratified by a standards body, is that the text of the spec defines what the spec is. It is the text of the spec that is submitted to the standards body, after all, not the test suite.