[MacPorts] #70999: xmlstarlet @1.6.1_4 Failed to build: incompatible function pointer types

[MacPorts]

#70999: xmlstarlet @1.6.1_4 Failed to build: incompatible function pointer types
----------------------------+--------------------
  Reporter:  briankennison  |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.10.1
Resolution:                 |   Keywords:
      Port:  xmlstarlet     |
----------------------------+--------------------

Comment (by ryandesign):

 This is probably due to changes in the latest libxml2; we've had to make
 fixes for this in other ports already.

 xmlstarlet bugs, such as this one, should be reported here:
 https://sourceforge.net/p/xmlstar/bugs/

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Ticket URL: <https://trac.macports.org/ticket/70999#comment:2>
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