> A file with refcount==0 has to be cleared, not reconnected.

Why does it "[have] to be" cleared rather than being reconnected?

> If was not present in the filesystem tree at the time of the crash,
> it just happended to be still open after being deleted.

Well, after the last filesystem link to it being destroyed.  Yes, but
that's not to say that its contents aren't valuable, or that it has to
be cleared rather than being reconnected (and its link count fixed).

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