bug#30265: Fish embeds store file names in UCS-4/UTF-32 literal strings

[Mark H Weaver <mhw@netris.org>]

John Soo <jsoo1@asu.edu> writes:
> I looked into it and I think a patch to fish might be required but I
> got buried in other work.

Note that commit 1bab9b9f17256a9e4f45f5b0cceb8b52e0a1b1ed (April 2021)
added support in our grafting code to find and rewrite UTF-16 and UTF-32
store references.  That might have mitigated or even eliminated the
adverse effects of this bug.

However, the Guix daemon's reference scanner still does not detect
UTF-16/32 references.  This could be a problem if some store item is
reachable *only* via UTF-16/32 store references, because "guix gc" might
delete it even though it is still needed.

However, if it is the case that every referenced store item is
represented in ASCII or UTF-8 at least once, everything should work.
Therefore, an easy workaround would be to add another phase that simply
creates a file in the output(s) that contains ASCII or UTF-8 references
to any needed store items.

      Mark

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