bug#31350: 27.0; `pcase' message: "Redundant pcase pattern"

[Lars Ingebrigtsen]

Drew Adams <drew.adams@oracle.com> writes:

> I mistakenly had not removed an old version of a pcase clause that I
> changed, so one of the two was redundant.  Compiling showed the
> redundancy message in *Messages*.

[...]

> Can the messaging at least tell you (1) all of a set of clauses that are
> mutually redundant and (2) which one of them will actually be used by
> the compiled code, the others presumably having been pruned?
>
> These are the two clauses in question:
>
>  (`,a `(not,a))
>  ((and a (guard (not recursivep))) `(not ,a))

Can you post a complete test case that demonstrates the problem?

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