[MacPorts] #57786: py37-graph-tool graph_draw throws segmentation fault without XQuartz running

[MacPorts]

#57786: py37-graph-tool graph_draw throws segmentation fault without XQuartz
running
----------------------------+----------------------
  Reporter:  ssllmit        |      Owner:  count0
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.5.4
Resolution:                 |   Keywords:
      Port:  py-graph-tool  |
----------------------------+----------------------

Comment (by mamoll):

 This is very odd. If I don't have X11 running and run the python code
 above, it works, but I do get this error:
 {{{
 ** (.:50936): WARNING **: 10:09:54.255: Failed to load shared library
 'libcairo-gobject.2.dylib' referenced by the typelib: dlopen(libcairo-
 gobject.2.dylib, 9): image not found
 }}}
 (and the X11 server is automatically launched in the background.)
 If I launch python like so:
 {{{
 env DYLD_LIBRARY_PATH=/opt/local/lib python
 }}}
 then things crash right after the import statement:
 {{{
 env DYLD_LIBRARY_PATH=/opt/local/lib python
 Python 3.7.1 (default, Oct 23 2018, 09:39:32)
 [Clang 10.0.0 (clang-1000.11.45.2)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import graph_tool.all as gt
 /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7
 /site-packages/graph_tool/draw/cairo_draw.py:39: RuntimeWarning: Error
 importing cairo. Graph drawing will not work.
   warnings.warn(msg, RuntimeWarning)
 /opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7
 /site-packages/graph_tool/draw/cairo_draw.py:39: RuntimeWarning: Error
 importing cairo. Graph drawing will not work.
   warnings.warn(msg, RuntimeWarning)
 Segmentation fault: 11
 }}}
 I have `py37-graph-tool @2.27_2+clang70+gtk3+openmp` installed.

-- 
Ticket URL: <https://trac.macports.org/ticket/57786#comment:2>
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