pkg/50505: graphics/py-cairo3 build failure with lang/python35

[dhgutteridge%sympatico.ca@localhost]

>Number:         50505
>Category:       pkg
>Synopsis:       graphics/py-cairo3 build failure with lang/python35
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 08 05:50:01 +0000 2015
>Originator:     David H. Gutteridge
>Release:        current
>Organization:
>Environment:
>Description:
Building graphics/py-cairo3 with lang/python35 results in:

Traceback (most recent call last):
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Scripting.py", line 93, in waf_entry_point
    run_commands()
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Scripting.py", line 145, in run_commands
    run_command(cmd_name)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Scripting.py", line 138, in run_command
    ctx.execute()
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Configure.py", line 124, in execute
    super(ConfigurationContext,self).execute()
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Context.py", line 87, in execute
    self.recurse([os.path.dirname(g_module.root_path)])
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Context.py", line 127, in recurse
    user_function(self)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/wscript", line 29, in configure
    ctx.check_python_headers()
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Configure.py", line 217, in fun
    return f(*k,**kw)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Tools/python.py", line 142, in check_python_headers
    result=conf.check(lib=name,uselib='PYEMBED',libpath=path,mandatory=False,msg='Checking for library %s in LIBPATH_PYEMBED'%name)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Configure.py", line 217, in fun
    return f(*k,**kw)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Tools/c_config.py", line 357, in check
    ret=self.run_c_code(*k,**kw)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Configure.py", line 217, in fun
    return f(*k,**kw)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Tools/c_config.py", line 435, in run_c_code
    bld.compile()
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Build.py", line 190, in compile
    self.store()
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Utils.py", line 300, in f
    ret=fun(*k,**kw)
  File "/home/disciple/pkgsrc/graphics/py-cairo3/work/pycairo-1.10.0/.waf3-1.6.4-e3c1e08604b18a10567cfcd2d02eb6e6/waflib/Build.py", line 164, in store
    cPickle.dump(data,f)
AttributeError: Can't pickle local object 'Context.__init__.<locals>.node_class'
Checking for library python3.5 in LIBPATH_PYEMBED : *** Error code 2

Stop.
make[4]: stopped in /home/disciple/pkgsrc/graphics/py-cairo3
*** Error code 1

>How-To-Repeat:
As above.
>Fix:
Unknown at present.