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microsoft / debugpy

An implementation of the Debug Adapter Protocol for Python
https://pypi.org/project/debugpy/
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Fatal Python Error on debugpy.adapter shutdown #1604

Open amadanmath opened 2 weeks ago

amadanmath commented 2 weeks ago

Environment data

Problem description

I was trying to set up nvim-dap-python on NeoVim. It works until I execute the last instruction; when the debugger is expected to shut down, a Problem Report for Python window pops up. Investigating further, I could reproduce the error purely in command-line, without NeoVim:

Starting the adapter with

$ python -m debugpy.adapter

and letting it output the first three events (two telemetry outputs, one debugpySockets); then stopping it with Ctrl-C.

Actual behavior

After outputting two more events, a Fatal Python Error is raised.

Content-Length: 137

{"seq": 1, "type": "event", "event": "output", "body": {"category": "telemetry", "output": "ptvsd", "data": {"packageVersion": "1.8.1"}}}Content-Length: 139

{"seq": 2, "type": "event", "event": "output", "body": {"category": "telemetry", "output": "debugpy", "data": {"packageVersion": "1.8.1"}}}Content-Length: 134

{"seq": 3, "type": "event", "event": "debugpySockets", "body": {"sockets": [{"host": "127.0.0.1", "port": 56546, "internal": false}]}}^CContent-Length: 79

{"seq": 4, "type": "event", "event": "debugpySockets", "body": {"sockets": []}}Content-Length: 79

{"seq": 5, "type": "event", "event": "debugpySockets", "body": {"sockets": []}}Fatal Python error: _enter_buffered_busy: could not acquire lock for <_io.BufferedReader name='<stdin>'> at interpreter shutdown, possibly due to daemon threads
Python runtime state: finalizing (tstate=0x00007f7960f05070)

Current thread 0x00007ff85fe507c0 (most recent call first):
  <no Python frame>
Abort trap: 6

Additionally, Problem Report for Python window is shown, with the following information:

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               Python [46526]
Path:                  /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/Resources/Python.app/Contents/MacOS/Python
Identifier:            org.python.python
Version:               3.10.14 (3.10.14)
Code Type:             X86-64 (Native)
Parent Process:        bash [45361]
Responsible:           kitty [1666]
User ID:               501

Date/Time:             2024-06-20 17:13:04.8525 +0900
OS Version:            macOS 13.6.7 (22G720)
Report Version:        12
Bridge OS Version:     8.5 (21P5077)
Anonymous UUID:        F0A08029-0D16-756F-668F-C79E48053E28

Sleep/Wake UUID:       B19F6CAE-971F-49D7-99FF-29949992B0B2

Time Awake Since Boot: 430000 seconds
Time Since Wake:       29734 seconds

System Integrity Protection: enabled

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

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

Termination Reason:    Namespace SIGNAL, Code 6 Abort trap: 6
Terminating Process:   Python [46526]

Application Specific Information:
abort() called

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib              0x7ff81c73c196 __pthread_kill + 10
1   libsystem_pthread.dylib             0x7ff81c773ee6 pthread_kill + 263
2   libsystem_c.dylib                   0x7ff81c69ab45 abort + 123
3   Python                                 0x104496174 fatal_error_exit + 13
4   Python                                 0x104495fe2 fatal_error + 30
5   Python                                 0x104498530 _Py_FatalErrorFormat + 300
6   Python                                 0x1044fdab9 _enter_buffered_busy + 231
7   Python                                 0x1044fbb00 buffered_close + 52
8   Python                                 0x10438cc47 method_vectorcall_NOARGS + 87
9   Python                                 0x1043832ce PyObject_VectorcallMethod + 135
10  Python                                 0x1045038ac _io_TextIOWrapper_close + 299
11  Python                                 0x10438cc47 method_vectorcall_NOARGS + 87
12  Python                                 0x1043832ce PyObject_VectorcallMethod + 135
13  Python                                 0x1044f671b iobase_finalize + 236
14  Python                                 0x1043c90a5 PyObject_CallFinalizerFromDealloc + 60
15  Python                                 0x104500cdb textiowrapper_dealloc + 18
16  Python                                 0x1043b39e4 insertdict + 1038
17  Python                                 0x1043c7b02 _PyModule_ClearDict + 601
18  Python                                 0x104497350 finalize_modules + 1280
19  Python                                 0x104496b2d Py_FinalizeEx + 581
20  Python                                 0x1044b4a69 Py_RunMain + 498
21  Python                                 0x1044b5b94 Py_BytesMain + 42
22  dyld                                0x7ff81c41941f start + 1903

Thread 1:
0   libsystem_kernel.dylib              0x7ff81c735f7e read + 10
1   Python                                 0x1044b32c6 _Py_read + 114
2   Python                                 0x1044f8696 _io_FileIO_readinto + 159
3   Python                                 0x10438cb8e method_vectorcall_O + 89
4   Python                                 0x1043832ce PyObject_VectorcallMethod + 135
5   Python                                 0x1044fe5a4 _bufferedreader_raw_read + 181
6   Python                                 0x1044fe4d7 _bufferedreader_fill_buffer + 51
7   Python                                 0x1044fe206 _buffered_readline + 347
8   Python                                 0x10438ce80 method_vectorcall_FASTCALL + 93
9   Python                                 0x104457e9a call_function + 173
10  Python                                 0x104453ab9 _PyEval_EvalFrameDefault + 32837
11  Python                                 0x10444ac06 _PyEval_Vector + 361
12  Python                                 0x104384a2d method_vectorcall + 354
13  Python                                 0x1044de63f partial_vectorcall + 378
14  Python                                 0x104457e9a call_function + 173
15  Python                                 0x104453b92 _PyEval_EvalFrameDefault + 33054
16  Python                                 0x10444ac06 _PyEval_Vector + 361
17  Python                                 0x104457e9a call_function + 173
18  Python                                 0x104453ab9 _PyEval_EvalFrameDefault + 32837
19  Python                                 0x10444ac06 _PyEval_Vector + 361
20  Python                                 0x104457e9a call_function + 173
21  Python                                 0x104453ab9 _PyEval_EvalFrameDefault + 32837
22  Python                                 0x10444ac06 _PyEval_Vector + 361
23  Python                                 0x104384aa2 method_vectorcall + 471
24  Python                                 0x104453d81 _PyEval_EvalFrameDefault + 33549
25  Python                                 0x10444ac06 _PyEval_Vector + 361
26  Python                                 0x104457e9a call_function + 173
27  Python                                 0x104453ab9 _PyEval_EvalFrameDefault + 32837
28  Python                                 0x10444ac06 _PyEval_Vector + 361
29  Python                                 0x104457e9a call_function + 173
30  Python                                 0x104453ab9 _PyEval_EvalFrameDefault + 32837
31  Python                                 0x10444ac06 _PyEval_Vector + 361
32  Python                                 0x104384aa2 method_vectorcall + 471
33  Python                                 0x1044f36d3 thread_run + 115
34  Python                                 0x1044a81f3 pythread_wrapper + 36
35  libsystem_pthread.dylib             0x7ff81c7741d3 _pthread_start + 125
36  libsystem_pthread.dylib             0x7ff81c76fbd3 thread_start + 15

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x00007ff85fe507c0  rcx: 0x00007ff7bbf25ff8  rdx: 0x0000000000000000
  rdi: 0x0000000000000103  rsi: 0x0000000000000006  rbp: 0x00007ff7bbf26020  rsp: 0x00007ff7bbf25ff8
   r8: 0x00000000005f1680   r9: 0xffffffff00000000  r10: 0x0000000000000000  r11: 0x0000000000000246
  r12: 0x0000000000000103  r13: 0x00007ff7bbf26290  r14: 0x0000000000000006  r15: 0x0000000000000016
  rip: 0x00007ff81c73c196  rfl: 0x0000000000000246  cr2: 0x0000000000000000

Logical CPU:     0
Error Code:      0x02000148 
Trap Number:     133

Binary Images:
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       0x10432b000 -        0x10459efff org.python.python (3.10.14, (c) 2001-2023 Python Software Foundation.) <b3157bb7-46b7-377f-b2aa-0f039ff3f421> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/Python
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       0x104296000 -        0x10429dfff zlib.cpython-310-darwin.so (*) <fac7861c-55fe-3456-9b81-5aaaead055fb> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/zlib.cpython-310-darwin.so
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       0x1042bd000 -        0x1042c4fff _lzma.cpython-310-darwin.so (*) <644c39e5-cef9-3c48-bada-1b2168aeb587> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_lzma.cpython-310-darwin.so
       0x1042fa000 -        0x104319fff liblzma.5.dylib (*) <74cc93b3-d104-3692-ab7a-7348e6fc3cdc> /usr/local/Cellar/xz/5.4.6/lib/liblzma.5.dylib
       0x1042aa000 -        0x1042adfff _opcode.cpython-310-darwin.so (*) <43b08d01-f707-3224-ab09-9066b622d5a5> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_opcode.cpython-310-darwin.so
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       0x1042e1000 -        0x1042e4fff _posixsubprocess.cpython-310-darwin.so (*) <8fbb87cb-8216-3bc4-88b0-117e9c56fd01> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_posixsubprocess.cpython-310-darwin.so
       0x10493f000 -        0x104946fff select.cpython-310-darwin.so (*) <2ce74d76-9fc2-3bc0-8afd-7cc27be1c085> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/select.cpython-310-darwin.so
       0x10496a000 -        0x104975fff math.cpython-310-darwin.so (*) <773e93b7-f5e6-380f-bbed-ea03a9fdae8f> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/math.cpython-310-darwin.so
       0x104953000 -        0x10495afff binascii.cpython-310-darwin.so (*) <931a83c9-83b3-3397-a960-f6186a3e416c> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/binascii.cpython-310-darwin.so
       0x10499f000 -        0x1049aefff _datetime.cpython-310-darwin.so (*) <4ac29922-a35b-3f51-8d9f-63fa1f50eca4> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_datetime.cpython-310-darwin.so
       0x1049bf000 -        0x1049c6fff _struct.cpython-310-darwin.so (*) <c2f1001e-d4c2-31ba-9665-29d2cc159c17> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_struct.cpython-310-darwin.so
       0x1049d3000 -        0x1049dafff pyexpat.cpython-310-darwin.so (*) <ef73d690-90a6-30b8-9512-b6347c4d5ef3> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/pyexpat.cpython-310-darwin.so
       0x1049e7000 -        0x1049f6fff _socket.cpython-310-darwin.so (*) <b6d662de-672d-3b1c-bf39-4cb33646aa98> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_socket.cpython-310-darwin.so
       0x104a03000 -        0x104a0afff array.cpython-310-darwin.so (*) <6001ca1b-1538-3c3e-803f-feff0c6c2287> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/array.cpython-310-darwin.so
       0x104982000 -        0x104985fff _bisect.cpython-310-darwin.so (*) <485e81fc-ed82-3a46-9452-15a4ab1b467c> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_bisect.cpython-310-darwin.so
       0x104b17000 -        0x104b1afff _random.cpython-310-darwin.so (*) <61604403-c554-381f-95a3-ff00c9a92939> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_random.cpython-310-darwin.so
       0x104b27000 -        0x104b2efff _sha512.cpython-310-darwin.so (*) <5380019c-27e5-33c2-8b09-5b57cb06adb9> /usr/local/Cellar/python@3.10/3.10.14/Frameworks/Python.framework/Versions/3.10/lib/python3.10/lib-dynload/_sha512.cpython-310-darwin.so
    0x7ff81c734000 -     0x7ff81c76dfff libsystem_kernel.dylib (*) <e82b6d50-ac03-370d-a74d-eb1a2725b6c5> /usr/lib/system/libsystem_kernel.dylib
    0x7ff81c76e000 -     0x7ff81c779fff libsystem_pthread.dylib (*) <60b15e1f-39ea-33a1-8616-3af57dc1094a> /usr/lib/system/libsystem_pthread.dylib
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    0x7ff81c413000 -     0x7ff81c4ab5ef dyld (*) <2faf54fd-58e6-360c-9bd8-2fbfe8be93d3> /usr/lib/dyld

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: 0
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=290.2M resident=0K(0%) swapped_out_or_unallocated=290.2M(100%)
Writable regions: Total=970.5M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=970.5M(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Kernel Alloc Once                    8K        1 
MALLOC                           187.2M       19 
MALLOC guard page                   24K        5 
MALLOC_MEDIUM (reserved)         360.0M        3         reserved VM address space (unallocated)
MALLOC_NANO (reserved)           384.0M        1         reserved VM address space (unallocated)
STACK GUARD                          8K        2 
Stack                             32.0M        2 
VM_ALLOCATE                       7172K        8 
__DATA                            3579K      155 
__DATA_CONST                      6002K      119 
__DATA_DIRTY                       339K       57 
__LINKEDIT                       171.6M       22 
__OBJC_RO                         66.3M        1 
__OBJC_RW                         2013K        2 
__TEXT                           118.6M      172 
dyld private memory                260K        2 
shared memory                       20K        3 
===========                     =======  ======= 
TOTAL                              1.3G      574 
TOTAL, minus reserved VM space   594.7M      574 

-----------
Full Report
-----------

{"app_name":"Python","timestamp":"2024-06-20 17:13:04.00 +0900","app_version":"3.10.14","slice_uuid":"00fef16c-f414-3007-b17e-5c5d39c99317","build_version":"3.10.14","platform":1,"bundleID":"org.python.python","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"macOS 13.6.7 (22G720)","roots_installed":0,"name":"Python","incident_id":"6BD81D45-E1DC-4840-8115-3FE476A10970"}
{
  "uptime" : 430000,
  "procRole" : "Unspecified",
  "version" : 2,
  "userID" : 501,
  "deployVersion" : 210,
  "modelCode" : "MacBookPro16,4",
  "coalitionID" : 1645,
  "osVersion" : {
    "train" : "macOS 13.6.7",
    "build" : "22G720",
    "releaseType" : "User"
  },
  "captureTime" : "2024-06-20 17:13:04.8525 +0900",
  "incident" : "6BD81D45-E1DC-4840-8115-3FE476A10970",
  "pid" : 46526,
  "cpuType" : "X86-64",
  "roots_installed" : 0,
  "bug_type" : "309",
  "procLaunch" : "2024-06-20 17:12:59.5958 +0900",
  "procStartAbsTime" : 434724816762336,
  "procExitAbsTime" : 434730072530794,
  "procName" : "Python",
  "procPath" : "\/usr\/local\/Cellar\/python@3.10\/3.10.14\/Frameworks\/Python.framework\/Versions\/3.10\/Resources\/Python.app\/Contents\/MacOS\/Python",
  "bundleInfo" : {"CFBundleShortVersionString":"3.10.14","CFBundleVersion":"3.10.14","CFBundleIdentifier":"org.python.python"},
  "storeInfo" : {"deviceIdentifierForVendor":"FA5450B9-64E2-5E63-BDBA-2BC691E52787","thirdParty":true},
  "parentProc" : "bash",
  "parentPid" : 45361,
  "coalitionName" : "net.kovidgoyal.kitty",
  "crashReporterKey" : "F0A08029-0D16-756F-668F-C79E48053E28",
  "responsiblePid" : 1666,
  "responsibleProc" : "kitty",
  "codeSigningID" : "",
  "codeSigningTeamID" : "",
  "codeSigningValidationCategory" : 0,
  "codeSigningTrustLevel" : 0,
  "wakeTime" : 29734,
  "bridgeVersion" : {"build":"21P5077","train":"8.5"},
  "sleepWakeUUID" : "B19F6CAE-971F-49D7-99FF-29949992B0B2",
  "sip" : "enabled",
  "exception" : {"codes":"0x0000000000000000, 0x0000000000000000","rawCodes":[0,0],"type":"EXC_CRASH","signal":"SIGABRT"},
  "termination" : {"flags":0,"code":6,"namespace":"SIGNAL","indicator":"Abort trap: 6","byProc":"Python","byPid":46526},
  "asi" : {"libsystem_c.dylib":["abort() called"]},
  "extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
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Expected behavior

No Fatal Python Error, and no Problem Report for Python window

Steps to reproduce:

  1. Run the adapter: python -m debugpy.adapter
  2. Abort the adapter using Ctrl-C.

I also tried with different versions of debugpy, all the way to debugpy==1.0.0, and I still get the same problem.

int19h commented 1 week ago

This is probably caused by the message reader background thread waiting on stdin.read() when KeyboardInterrupt happens on main thread. If so, I think it could be fixed by catching the exception there and pre-emptively os.close(stdin_fd) before exiting.

amadanmath commented 17 hours ago

I am not sure I understand it correctly, not knowing the structure of debugpy, but note that the same happens without KeyboardInterrupt, purely by executing the last line of the program from NeoVim's debugger (nvim-dap). So it seems it might be on any exit of pydebug, not just keyboard interrupted one. I don't know how to speak the pydebug protocol, so I can't test the hypothesis without the aid of an editor.