[MacPorts] #39923: webkit-gtk @2.04: build failure with bison @3.0_0

[MacPorts]

#39923: webkit-gtk @2.04: build failure with bison @3.0_0
-------------------------+------------------------
  Reporter:  istlota@…   |      Owner:  jeremyhu@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  webkit-gtk  |
-------------------------+------------------------

Comment (by tony.li@…):

 Workaround:

 {{{
 port activate bison at 2.7.1_9
 port clean webkit-gtk
 port upgrade webkit-gtk
 }}}

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Ticket URL: <https://trac.macports.org/ticket/39923#comment:25>
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