[MacPorts] #56590: After successfully installing pdftk, port is reporting broken pdftk

[MacPorts]

#56590: After successfully installing pdftk, port is reporting broken pdftk
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 Reporter:  amadeus24  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:  MacPorts 2.5.1
Component:  ports      |    Version:  2.5.0
 Keywords:             |       Port:
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 Have macOS 10.13.5, Xcode 9.4 and new installed macports.
 Have installed pdftk and after the port is installed I get the message the
 pdftk port is broken. I run the install option with "-v" so I captured the
 log-file.
 Run **port -d -y rev-upgrade** and
 **port rev-upgrade**
 -> Always with same result.
 Clean everything, uninstall pdftk and repeat the procedure. -> Same
 result.
 Curious is, the package is installed and works fine, just the message
 troubles me.

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Ticket URL: <https://trac.macports.org/ticket/56590>
MacPorts <https://www.macports.org/>
Ports system for macOS