[MacPorts] #66815: Something in Macports 2.8.1 broken a number of R ports

[MacPorts]

#66815: Something in Macports 2.8.1 broken a number of R ports
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  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  High          |  Milestone:
 Component:  base          |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:                |
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Changes (by barracuda156):

 * priority:  Normal => High


Old description:

> See: https://github.com/macports/macports-
> ports/pull/17555#issuecomment-1413348049
>
> The same port builds fine in 2.8.0, but fails after I updated Macports to
> 2.8.1. This also explains multiple failures on CI in that PR, which were
> a total surprise for me, since everything built fine locally **and also
> built fine on CI earlier** (in initial, huge version of the PR which I
> downscaled, removing 2/3 of ports).

New description:

 See: https://github.com/macports/macports-
 ports/pull/17555#issuecomment-1413348049

 The same port builds fine in 2.8.0, but fails after I updated Macports to
 2.8.1. This also explains multiple failures on CI in that PR, which were a
 total surprise for me, since everything built fine locally **and also
 built fine on CI earlier** (in initial, huge version of the PR which I
 downscaled, removing 2/3 of ports).

 UPD.

 I have found the proximate cause: what was previously created as a symlink
 to extracted source, now is created as an empty directory. Sure enough,
 nothing works. Already existing R ports are broken too, at least some of
 them (it seems CRAN-sources ports are broken, but not Github-sourced).

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Ticket URL: <https://trac.macports.org/ticket/66815#comment:2>
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