homepage

I am currently (occasionally) running into the same problem, using Python 3.6.0 on OSX 10.12.3.
I cannot reproduce this segmentation fault reliably, it happens after running for a while in production. This appears to be similar to issue 13829.
python traceback (trimmed):
Fatal Python error: Segmentation fault
Current thread 0x00007000065fb000 (most recent call first):
 File "/usr/local/Cellar/python3/3.6.0_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 2592 in proxy_bypass_macosx_sysconf
 File "/usr/local/Cellar/python3/3.6.0_1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 2616 in proxy_bypass
 File "/Users/daniel/Workspace/venv/lib/python3.6/site-packages/requests/utils.py", line 677 in should_bypass_proxies
 File "/Users/daniel/Workspace/venv/lib/python3.6/site-packages/requests/utils.py", line 693 in get_environ_proxies
 File "/Users/daniel/Workspace/venv/lib/python3.6/site-packages/requests/sessions.py", line 686 in merge_environment_settings
 File "/Users/daniel/Workspace/venv/lib/python3.6/site-packages/requests/sessions.py", line 509 in request
 File "/Users/daniel/Workspace/venv/lib/python3.6/site-packages/requests/api.py", line 58 in request
crash dump traceback (trimmed):
* thread #1: tid = 0x0000, 0x00007fffc1ef0dd6 libsystem_kernel.dylib`__pthread_kill + 10, stop reason = signal SIGSTOP
 * frame #0: 0x00007fffc1ef0dd6 libsystem_kernel.dylib`__pthread_kill + 10
 frame #1: 0x00007fffc1fdc787 libsystem_pthread.dylib`pthread_kill + 90
 frame #2: 0x00007fffc1e07497 libsystem_c.dylib`raise + 26
 frame #3: 0x00007fffc1fcfbba libsystem_platform.dylib`_sigtramp + 26
 frame #4: 0x00007fffc1da188f libdispatch.dylib`_dispatch_queue_push + 172
 frame #5: 0x00007fffc1d91572 libdispatch.dylib`_dispatch_mach_msg_send + 657
 frame #6: 0x00007fffc1d924ba libdispatch.dylib`_dispatch_mach_send_drain + 280
 frame #7: 0x00007fffc1da91ea libdispatch.dylib`_dispatch_mach_send_push_and_trydrain + 487
 frame #8: 0x00007fffc1da6745 libdispatch.dylib`_dispatch_mach_send_msg + 282
 frame #9: 0x00007fffc1da6804 libdispatch.dylib`dispatch_mach_send_with_result + 50
 frame #10: 0x00007fffc201f25e libxpc.dylib`_xpc_connection_enqueue + 104
 frame #11: 0x00007fffc201eca3 libxpc.dylib`xpc_connection_send_message_with_reply + 152
 frame #12: 0x00007fffac99b8e5 CoreFoundation`__80-[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:]_block_invoke_2 + 133
 frame #13: 0x00007fffac9cb4e4 CoreFoundation`-[_CFXPreferences withConnectionForRole:performBlock:] + 36
 frame #14: 0x00007fffac99b817 CoreFoundation`__80-[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:]_block_invoke + 199
 frame #15: 0x00007fffac99b662 CoreFoundation`-[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:] + 226
 frame #16: 0x00007fffac81ee80 CoreFoundation`-[CFPrefsSearchListSource alreadylocked_copyDictionary] + 336
 frame #17: 0x00007fffac81eb5c CoreFoundation`-[CFPrefsSearchListSource alreadylocked_copyValueForKey:] + 60
 frame #18: 0x00007fffac94dd75 CoreFoundation`-[CFPrefsSource copyValueForKey:] + 53
 frame #19: 0x00007fffac9c9b00 CoreFoundation`__76-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:]_block_invoke + 32
 frame #20: 0x00007fffac99ca32 CoreFoundation`__108-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:]_block_invoke + 290
 frame #21: 0x00007fffac99c8a9 CoreFoundation`-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:] + 345
 frame #22: 0x00007fffac9c9a66 CoreFoundation`-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:] + 310
 frame #23: 0x00007fffb343a56f SystemConfiguration`SCDynamicStoreCopyProxiesWithOptions + 164
 frame #24: 0x000000010b36f926 _scproxy.cpython-36m-darwin.so`get_proxy_settings + 24
 frame #25: 0x000000010942148b Python`_PyCFunction_FastCallDict + 529
 frame #26: 0x0000000109488959 Python`call_function + 562
 frame #27: 0x0000000109485d10 Python`_PyEval_EvalFrameDefault + 26835