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classification
Title: Mac OS High Sierra Beta - Python Crash
Type: crash Stage: resolved
Components: macOS Versions: Python 3.6, Python 2.7
process
Status: closed Resolution: third party
Dependencies: Superseder:
Assigned To: Nosy List: ayesjm, jaraco, ned.deily, ronaldoussoren
Priority: normal Keywords:

Created on 2017-07-03 14:39 by ayesjm, last changed 2022-04-11 14:58 by admin. This issue is now closed.

Messages (9)
msg297598 - (view) Author: Joshua (ayesjm) Date: 2017-07-03 14:38 
Process:               Python [13106]
Path:                  /System/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python
Identifier:            Python
Version:               2.7.10 (2.7.10)
Code Type:             X86-64 (Native)
Parent Process:        Python [13070]
Responsible:           Python [13106]
User ID:               501

Date/Time:             2017-07-03 10:28:23.591 -0400
OS Version:            Mac OS X 10.13 (17A291m)
Report Version:        12
Anonymous UUID:        C76645A8-C44A-EAB5-D937-2BD69A20A0A9


Time Awake Since Boot: 18000 seconds

System Integrity Protection: enabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY

Termination Reason:    Namespace OBJC, Code 0x1

Application Specific Information:
crashed on child side of fork pre-exec
objc[13106]: +[__NSPlaceholderDate initialize] may have been in progress in another thread when fork() was called.

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	0x00007fffbded33d6 __abort_with_payload + 10
1   libsystem_kernel.dylib        	0x00007fffbdecdf71 abort_with_payload_wrapper_internal + 89
2   libsystem_kernel.dylib        	0x00007fffbdecdf18 abort_with_reason + 22
3   libobjc.A.dylib               	0x00007fffbd1a99f2 _objc_fatalv(unsigned long long, unsigned long long, char const*, __va_list_tag*) + 108
4   libobjc.A.dylib               	0x00007fffbd1a98a4 _objc_fatal(char const*, ...) + 135
5   libobjc.A.dylib               	0x00007fffbd1aa4cb performForkChildInitialize(objc_class*, objc_class*) + 341
6   libobjc.A.dylib               	0x00007fffbd19ae8f lookUpImpOrForward + 228
7   libobjc.A.dylib               	0x00007fffbd19a914 _objc_msgSend_uncached + 68
8   com.apple.CoreFoundation      	0x00007fff96aa2a92 CFDateCreate + 34
9   com.apple.CoreFoundation      	0x00007fff96aa0168 __CFBinaryPlistCreateObjectFiltered + 1608
10  com.apple.CoreFoundation      	0x00007fff96aa1947 __CFBinaryPlistCreateObjectFiltered + 7719
11  com.apple.CoreFoundation      	0x00007fff96a86b1b __CFTryParseBinaryPlist + 187
12  com.apple.CoreFoundation      	0x00007fff96a864b1 _CFPropertyListCreateWithData + 97
13  com.apple.CoreFoundation      	0x00007fff96a863a0 CFPropertyListCreateWithData + 80
14  com.apple.CoreFoundation      	0x00007fff96a9f08b -[CFPrefsPlistSource handleReply:toRequestNewDataMessage:onConnection:retryCount:error:] + 683
15  com.apple.CoreFoundation      	0x00007fff96a9edb3 __93-[CFPrefsSearchListSource handleReply:toRequestNewDataMessage:onConnection:retryCount:error:]_block_invoke + 147
16  libxpc.dylib                  	0x00007fffbe040d71 xpc_array_apply + 57
17  com.apple.CoreFoundation      	0x00007fff96a9ecec -[CFPrefsSearchListSource handleReply:toRequestNewDataMessage:onConnection:retryCount:error:] + 300
18  com.apple.CoreFoundation      	0x00007fff96c2644c __80-[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:]_block_invoke_3.139 + 76
19  com.apple.CoreFoundation      	0x00007fff96c4d3e4 -[_CFXPreferences withConnectionForRole:performBlock:] + 36
20  com.apple.CoreFoundation      	0x00007fff96c263f5 __80-[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:]_block_invoke_2.138 + 117
21  libsystem_trace.dylib         	0x00007fffbe01f1ab _os_activity_initiate_impl + 53
22  com.apple.CoreFoundation      	0x00007fff96c26352 __80-[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:]_block_invoke.136 + 114
23  com.apple.CoreFoundation      	0x00007fff96c25c97 CFPREFERENCES_IS_WAITING_FOR_USER_CFPREFSD + 39
24  com.apple.CoreFoundation      	0x00007fff96c25eec -[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:] + 348
25  com.apple.CoreFoundation      	0x00007fff96a9d476 -[CFPrefsSearchListSource alreadylocked_copyDictionary] + 326
26  com.apple.CoreFoundation      	0x00007fff96a9cff3 -[CFPrefsSearchListSource alreadylocked_copyValueForKey:] + 67
27  com.apple.CoreFoundation      	0x00007fff96be1465 -[CFPrefsSource copyValueForKey:] + 53
28  com.apple.CoreFoundation      	0x00007fff96c4c040 __76-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:]_block_invoke + 32
29  com.apple.CoreFoundation      	0x00007fff96c2730f __108-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:]_block_invoke + 287
30  com.apple.CoreFoundation      	0x00007fff96c27185 -[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:] + 341
31  com.apple.CoreFoundation      	0x00007fff96c4bfe3 -[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:] + 131
32  com.apple.SystemConfiguration 	0x00007fffa3022745 SCDynamicStoreCopyProxiesWithOptions + 155
33  _scproxy.so                   	0x000000010503092a 0x105030000 + 2346
34  org.python.python             	0x00007fffa1339280 PyEval_EvalFrameEx + 3676
35  org.python.python             	0x00007fffa133e256 0x7fffa12b8000 + 549462
36  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
37  org.python.python             	0x00007fffa133e256 0x7fffa12b8000 + 549462
38  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
39  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
40  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
41  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
42  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
43  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
44  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
45  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
46  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
47  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
48  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
49  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
50  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
51  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
52  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
53  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
54  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
55  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
56  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
57  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
58  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
59  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
60  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
61  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
62  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
63  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
64  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
65  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
66  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
67  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
68  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
69  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
70  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
71  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
72  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
73  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
74  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
75  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
76  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
77  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
78  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
79  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
80  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
81  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
82  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
83  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
84  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
85  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
86  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
87  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
88  org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
89  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
90  org.python.python             	0x00007fffa133e256 0x7fffa12b8000 + 549462
91  org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
92  org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
93  org.python.python             	0x00007fffa12df935 0x7fffa12b8000 + 162101
94  org.python.python             	0x00007fffa12c2581 PyObject_Call + 97
95  org.python.python             	0x00007fffa12ccc9e 0x7fffa12b8000 + 85150
96  org.python.python             	0x00007fffa12c2581 PyObject_Call + 97
97  org.python.python             	0x00007fffa1307c78 0x7fffa12b8000 + 326776
98  org.python.python             	0x00007fffa1303434 0x7fffa12b8000 + 308276
99  org.python.python             	0x00007fffa12c2581 PyObject_Call + 97
100 org.python.python             	0x00007fffa1338f76 PyEval_EvalFrameEx + 2898
101 org.python.python             	0x00007fffa133e256 0x7fffa12b8000 + 549462
102 org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
103 org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
104 org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
105 org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
106 org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
107 org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
108 org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
109 org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
110 org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
111 org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
112 org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
113 org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
114 org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
115 org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
116 org.python.python             	0x00007fffa133e2b4 0x7fffa12b8000 + 549556
117 org.python.python             	0x00007fffa1338b45 PyEval_EvalFrameEx + 1825
118 org.python.python             	0x00007fffa1338232 PyEval_EvalCodeEx + 1551
119 org.python.python             	0x00007fffa1337c1d PyEval_EvalCode + 32
120 org.python.python             	0x00007fffa1356ad1 0x7fffa12b8000 + 649937
121 org.python.python             	0x00007fffa1356b78 PyRun_FileExFlags + 130
122 org.python.python             	0x00007fffa13566fa PyRun_SimpleFileExFlags + 706
123 org.python.python             	0x00007fffa136796c Py_Main + 3064
124 libdyld.dylib                 	0x00007fffbdd85ff9 start + 1

Thread 1:
0   libsystem_kernel.dylib        	0x00007fffbded477a __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fffbe00523e _pthread_wqthread + 995
2   libsystem_pthread.dylib       	0x00007fffbe004e49 start_wqthread + 13

Thread 2:
0   libsystem_kernel.dylib        	0x00007fffbded477a __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fffbe005440 _pthread_wqthread + 1509
2   libsystem_pthread.dylib       	0x00007fffbe004e49 start_wqthread + 13

Thread 3:
0   libsystem_kernel.dylib        	0x00007fffbded477a __workq_kernreturn + 10
1   libsystem_pthread.dylib       	0x00007fffbe00523e _pthread_wqthread + 995
2   libsystem_pthread.dylib       	0x00007fffbe004e49 start_wqthread + 13

Thread 4:
0   libsystem_pthread.dylib       	0x00007fffbe004e3c start_wqthread + 0
1   ???                           	0x00007fffc6497930 OBJC_METACLASS_$_OS_xpc_date + 40

Thread 5:
0   libsystem_pthread.dylib       	0x00007fffbe004e3c start_wqthread + 0

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000002000209  rbx: 0x0000000000000001  rcx: 0x00007fff5b0d6d88  rdx: 0x0000000000000000
  rdi: 0x0000000000000008  rsi: 0x0000000000000001  rbp: 0x00007fff5b0d6de0  rsp: 0x00007fff5b0d6d88
   r8: 0x00007f8ac94a1580   r9: 0x0000000000000080  r10: 0x0000000000000000  r11: 0x0000000000000246
  r12: 0x0000000000000000  r13: 0x0000000000000000  r14: 0x0000000000000008  r15: 0x0000000000000080
  rip: 0x00007fffbded33d6  rfl: 0x0000000000000246  cr2: 0x0000000105307000
  
Logical CPU:     0
Error Code:      0x02000209
Trap Number:     133


Binary Images:
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       0x104c75000 -        0x104c76fff  _locale.so (109) <D782AA04-BB60-3682-8329-5AED24C72B84> /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_locale.so
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       0x1051a7000 -        0x1051a9fff  select.so (109) <1D095B7D-A935-326A-A485-E954F047EAD4> /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/select.so
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       0x10524a000 -        0x10524bfff  termios.so (109) <9067E25A-DC89-3123-BC27-11DA5C570518> /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/termios.so
       0x105251000 -        0x10525afff  _curses.so (109) <18410BC2-054C-358F-AABF-196DC9456562> /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_curses.so
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    0x7fffbdffa000 -     0x7fffbe001ff7  libsystem_platform.dylib (158) <ABB49DE6-7918-325A-9D3F-98D393DFC70B> /usr/lib/system/libsystem_platform.dylib
    0x7fffbe002000 -     0x7fffbe00dfff  libsystem_pthread.dylib (293) <5EDB59B9-556E-3AD3-871A-BB634DFB8020> /usr/lib/system/libsystem_pthread.dylib
    0x7fffbe00e000 -     0x7fffbe011ffb  libsystem_sandbox.dylib (745.0.0.0.1) <D8674767-FB66-39AB-AA2D-A10777407B0C> /usr/lib/system/libsystem_sandbox.dylib
    0x7fffbe012000 -     0x7fffbe013ff3  libsystem_secinit.dylib (29) <DA243870-EC66-339D-B07A-E5BE6214AE78> /usr/lib/system/libsystem_secinit.dylib
    0x7fffbe014000 -     0x7fffbe01bffb  libsystem_symptoms.dylib (787) <437DF646-70A9-3CFE-AF3B-EEBDD569A104> /usr/lib/system/libsystem_symptoms.dylib
    0x7fffbe01c000 -     0x7fffbe02ffff  libsystem_trace.dylib (793) <28C3B223-F0EE-315D-82B7-1B6529AEA58A> /usr/lib/system/libsystem_trace.dylib
    0x7fffbe031000 -     0x7fffbe036ff7  libunwind.dylib (35.3) <05D93F98-913F-315C-9817-B6CEE7741CE4> /usr/lib/system/libunwind.dylib
    0x7fffbe037000 -     0x7fffbe062fff  libxpc.dylib (1173) <C636ADC4-2C4D-3DF0-BA21-B97275B90214> /usr/lib/system/libxpc.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 48961
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=290.6M resident=0K(0%) swapped_out_or_unallocated=290.6M(100%)
Writable regions: Total=135.9M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=135.9M(100%)
 
                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Activity Tracing                   256K        2 
Dispatch continuations            16.0M        2 
Kernel Alloc Once                    8K        2 
MALLOC                            83.6M       23 
MALLOC guard page                   32K        9 
STACK GUARD                       56.0M        7 
Stack                             18.6M        9 
Stack Guard                          8K        3 
VM_ALLOCATE                       17.3M       32 
__DATA                            15.0M      229 
__FONT_DATA                          4K        2 
__LINKEDIT                       186.6M       49 
__TEXT                           104.0M      229 
__UNICODE                          556K        2 
shared memory                       60K        7 
===========                     =======  ======= 
TOTAL                            497.9M      592 

Model: MacBookPro11,4, BootROM MBP114.0172.B16, 4 processors, Intel Core i7, 2.2 GHz, 16 GB, SMC 2.29f24
Graphics: Intel Iris Pro, Intel Iris Pro, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533642465238412D50422020
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x484D54343147533642465238412D50422020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x152), Broadcom BCM43xx 1.0 (7.77.28.0.1a2)
Bluetooth: Version 6.0.0d47, 3 services, 27 devices, 1 incoming serial ports
Network Service: Thunderbolt Ethernet Slot 3, Ethernet, en7
Network Service: Wi-Fi, AirPort, en0
PCI Card: pci1b73,1100, USB eXtensible Host Controller, Thunderbolt@194,0,0
PCI Card: ethernet, Ethernet Controller, Thunderbolt@193,0,0
PCI Card: pci1b73,1100, USB eXtensible Host Controller, Thunderbolt@192,0,0
PCI Card: pci11c1,5901, IEEE 1394 Open HCI, Thunderbolt@191,0,0
Serial ATA Device: OWC Aura SSD, 960.04 GB
Serial ATA Device: MARVELL VIRTUAL
USB Device: USB 3.0 Bus
USB Device: Internal Memory Card Reader
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Bluetooth USB Host Controller
USB Device: USB 3.0 Bus
USB Device: USB audio CODEC
USB Device: USB 3.0 Bus
USB Device: USB Receiver
Thunderbolt Bus: MacBook Pro, Apple Inc., 27.1
Thunderbolt Device: Thunderbolt 2 Dock, Other World Computing, Inc., 1, 25.1
msg297607 - (view) Author: Ned Deily (ned.deily) * (Python committer) Date: 2017-07-03 19:09 
Sorry, without more information, there is not much we can do about this.  Can you supply a reproducible test case?  In any case, the crash is from use of the Apple-supplied system Python 2.7.10 which is a few releases behind the most recent released upstream (2.7.13).  And it is running on pre-release public beta.  You should report the problem to Apple using their Feedback Assistant.

All that said, the crash trace does show the Python helper extension module _scproxy in the chain and _scproxy has been problematic in the past: it is used to get network proxy information from the System Configuration framework. Previous crashes seemed to be due to lack of thread-safety in Apple's libdispatch, see for bpo-30385, but that doesn't seem to be the case here.  Things may work differently under the covers in High Sierra.  If you are able to reliably reproduce the problem, it would be interesting to see if the workaround in http://bugs.python.org/issue30385#msg293958 helps.
msg297630 - (view) Author: Ronald Oussoren (ronaldoussoren) * (Python committer) Date: 2017-07-04 09:16 
Joshua: does your script use os.fork(), or multiprocessing? 

In that case this is a known issue made worse on High Sierra: _scproxy uses Cocoa libraries, and those cause problems when using for without exec. In High Sierra the Cocoa libraries are more strict and are hence more likely to cause problems like this.

There's not much we can do about that, other than avoiding using _scproxy. If you don't use a proxy server setting "no_proxy" in your shell environment should do the trick.
msg297889 - (view) Author: Ronald Oussoren (ronaldoussoren) * (Python committer) Date: 2017-07-07 15:01 
I proprose closing this issue as there's too little information to reproduce the problem, the crash is using a system build of Python on a beta version of macOS and this appears to be a known issue.
msg297910 - (view) Author: Ned Deily (ned.deily) * (Python committer) Date: 2017-07-07 20:57 
I agree with Ronald.  Feel free to reopen if a reproducible test case can be supplied and duplicated with, say, a python.org Python.  We still may not be able to do much about it other than suggest avoiding the proxy lookup.
msg387830 - (view) Author: Jason R. Coombs (jaraco) * (Python committer) Date: 2021-03-01 02:48 
I've stumbled into this issue and it's started occurring reliably on keyring in Python 3.6 as found on Github CI (https://github.com/jaraco/keyring/runs/1994652010?check_suite_focus=true).

It's not a highly-reproducible environment. I can't replicate it on my local machine, so there's probably something about how Github CI has changed the environment that's started to trigger the error.

It happens in the multiprocessing tests.
msg387831 - (view) Author: Jason R. Coombs (jaraco) * (Python committer) Date: 2021-03-01 02:54 
I started tracking it down in https://github.com/jaraco/keyring/issues/494 and found I'd previously delved deep into a related issue (https://github.com/jaraco/keyring/issues/281).
msg387832 - (view) Author: Ned Deily (ned.deily) * (Python committer) Date: 2021-03-01 02:58 
If the crashes are occurring while the multiprocessing fork tests are running, it's likely the issue described in Issue33725. In Python 3.8, the default start method for multiprocessing on macOS was changed to be "spawn" rather than "fork" because of the inherent issues with fork/no-exec on macOS. You could try backporting that to your 3.6.

https://docs.python.org/3.8/library/multiprocessing.html#contexts-and-start-methods
msg387833 - (view) Author: Jason R. Coombs (jaraco) * (Python committer) Date: 2021-03-01 03:00 
All good. Thanks for the references. As with the prior issues, I'm going to just suppress those failures.
History
Date User Action Args
2022-04-11 14:58:48adminsetgithub: 75020
2021-03-01 03:00:23jaracosetmessages: + msg387833
2021-03-01 02:58:43ned.deilysetmessages: + msg387832
2021-03-01 02:54:55jaracosetmessages: + msg387831
2021-03-01 02:48:17jaracosetnosy: + jaraco

messages: + msg387830
versions: + Python 3.6
2017-07-07 20:57:50ned.deilysetstatus: open -> closed
resolution: third party
messages: + msg297910

stage: resolved
2017-07-07 15:01:15ronaldoussorensetmessages: + msg297889
2017-07-04 09:16:57ronaldoussorensetmessages: + msg297630
2017-07-03 19:09:43ned.deilysetmessages: + msg297607
2017-07-03 14:39:01ayesjmcreate