[MacPorts] #59826: py37-tensorflow 2.0.0 crashes with protobuf3

[MacPorts]

#59826: py37-tensorflow 2.0.0 crashes with protobuf3
-----------------------+-----------------------------
 Reporter:  essandess  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:  2.6.2
 Keywords:             |       Port:  py37-tensorflow
-----------------------+-----------------------------
 {{{
 python3 -c 'import tensorflow'
 }}}
 {{{
 [libprotobuf ERROR google/protobuf/descriptor_database.cc:394] Invalid
 file descriptor data passed to EncodedDescriptorDatabase::Add().
 [libprotobuf FATAL google/protobuf/descriptor.cc:1359] CHECK failed:
 GeneratedDatabase()->Add(encoded_file_descriptor, size):
 libc++abi.dylib: terminating with uncaught exception of type
 google::protobuf::FatalException: CHECK failed:
 GeneratedDatabase()->Add(encoded_file_descriptor, size):
 Abort trap: 6
 }}}

 Tried uninstall/reinstall of protobuf3-cpp, py37-protobuf3,
 py37-tensorflow, Xcode 11.2.1, all without success.

 This is on macOS 10.14.

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Ticket URL: <https://trac.macports.org/ticket/59826>
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