[MacPorts] #55151: port install fails if $COLUMNS is unset

[MacPorts]

#55151: port install fails if $COLUMNS is unset
------------------------+-------------------
 Reporter:  yesthatjwz  |      Owner:
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.4.2
 Keywords:              |       Port:
------------------------+-------------------
 {{{
 % port install openssl
 --->  Computing dependencies for openssl
 --->  Cleaning openssl
 --->  Scanning binaries for linking errors
 Error: rev-upgrade failed: can't read "env(COLUMNS)": no such variable
 }}}


 Setting $COLUMNS fixes it, but that's dumb.

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Ticket URL: <https://trac.macports.org/ticket/55151>
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