Commented Unassigned: pykd 0.3.2.0 crashes python 3.6.0 on unload [14074]

Initialializing pykd (e.g. by starting and quitting and interactive session immediately) and then unloading it again will crash windbg.

The point of the crash is here: https://github.com/python/cpython/blob/3.6/Python/ceval_gil.h#L175

So something funky must be happening with the GIL.

Python version: Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 07:18:10) [MSC v.1900 32 bit (Intel)] on win32

Stack trace of the crash:
```
# ChildEBP RetAddr Args to Child
00 06fecf98 77e3bb6b 00720064 0070006f 0067005f ucrtbase!abort+0x4b
01 06fecfec 77e138e6 77f4e3f4 084fd298 77e0145e python36!Py_FatalError+0xfb [c:\build\cpython36\python\pylifecycle.c @ 1457]
02 06fecff8 77e0145e 00000000 086da238 00000002 python36!drop_gil+0x16 [c:\build\cpython36\python\ceval_gil.h @ 175]
03 (Inline) -------- -------- -------- -------- python36!PyEval_SaveThread+0x34 [c:\build\cpython36\python\ceval.c @ 355]
04 06fed014 77dfffc4 08763288 00000000 00020019 python36!winreg_OpenKey_impl+0x3e [c:\build\cpython36\pc\winreg.c @ 1317]
05 06fed038 77db35d5 086d0d50 08695488 00000002 python36!winreg_OpenKey+0x54 [c:\build\cpython36\pc\clinic\winreg.c.h @ 645]
06 06fed068 77db370e 77dfff70 08695488 00000002 python36!_PyCFunction_FastCallDict+0x1a5 [c:\build\cpython36\objects\methodobject.c @ 251]
07 06fed08c 77e19407 086da238 08695488 00000002 python36!_PyCFunction_FastCallKeywords+0x3e [c:\build\cpython36\objects\methodobject.c @ 295]
08 06fed0bc 77e14d10 00000000 08695340 086d64dc python36!call_function+0xf7 [c:\build\cpython36\python\ceval.c @ 4788]
09 06fed13c 77e1951a 08695340 00000000 00000002 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
0a (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x10 [c:\build\cpython36\python\ceval.c @ 718]
0b 06fed158 77e19591 00000002 086af480 086c5030 python36!_PyFunction_FastCall+0x5a [c:\build\cpython36\python\ceval.c @ 4872]
0c 06fed17c 77e19467 00000002 00000000 00000083 python36!fast_function+0x51 [c:\build\cpython36\python\ceval.c @ 4905]
0d 06fed1a4 77e14d10 00000000 086d6380 086d633c python36!call_function+0x157 [c:\build\cpython36\python\ceval.c @ 4809]
0e 06fed224 77e1951a 086d6380 00000000 00000002 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
0f (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x10 [c:\build\cpython36\python\ceval.c @ 718]
10 06fed240 77e19591 00000002 086af480 086c5078 python36!_PyFunction_FastCall+0x5a [c:\build\cpython36\python\ceval.c @ 4872]
11 06fed264 77e19467 00000002 00000000 00000083 python36!fast_function+0x51 [c:\build\cpython36\python\ceval.c @ 4905]
12 06fed28c 77e14d10 00000000 086b3808 086d61d8 python36!call_function+0x157 [c:\build\cpython36\python\ceval.c @ 4809]
13 06fed308 77e185a5 086d61d8 00000000 086c50c0 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
14 (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x13 [c:\build\cpython36\python\ceval.c @ 718]
15 06fed354 77e19614 00000000 0865d56c 00000004 python36!_PyEval_EvalCodeWithName+0x735 [c:\build\cpython36\python\ceval.c @ 4119]
16 06fed3a4 77e19467 00000004 00000002 00000083 python36!fast_function+0xd4 [c:\build\cpython36\python\ceval.c @ 4929]
17 06fed3cc 77e14d10 00000000 0869ef98 0865d400 python36!call_function+0x157 [c:\build\cpython36\python\ceval.c @ 4809]
18 06fed448 77e185a5 0865d400 00000000 086a9db0 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
19 (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x13 [c:\build\cpython36\python\ceval.c @ 718]
1a 06fed494 77e19614 00000000 08701670 00000002 python36!_PyEval_EvalCodeWithName+0x735 [c:\build\cpython36\python\ceval.c @ 4119]
1b 06fed4e4 77e19467 00000002 00000001 00000083 python36!fast_function+0xd4 [c:\build\cpython36\python\ceval.c @ 4929]
1c 06fed50c 77e14d10 00000000 08701510 08701324 python36!call_function+0x157 [c:\build\cpython36\python\ceval.c @ 4809]
1d 06fed58c 77e1951a 08701510 00000000 00000002 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
1e (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x10 [c:\build\cpython36\python\ceval.c @ 718]
1f 06fed5a8 77e19591 00000002 086a2420 086a9e40 python36!_PyFunction_FastCall+0x5a [c:\build\cpython36\python\ceval.c @ 4872]
20 06fed5cc 77e19467 00000002 00000000 00000083 python36!fast_function+0x51 [c:\build\cpython36\python\ceval.c @ 4905]
21 06fed5f4 77e14d10 00000000 087011d0 06fed718 python36!call_function+0x157 [c:\build\cpython36\python\ceval.c @ 4809]
22 06fed670 77e1951a 087011d0 00000000 086a9e88 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
23 (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x10 [c:\build\cpython36\python\ceval.c @ 718]
24 06fed68c 77e1969d 00000002 086a2420 086a9e88 python36!_PyFunction_FastCall+0x5a [c:\build\cpython36\python\ceval.c @ 4872]
25 06fed6c4 77d772d1 086a9e88 06fed710 00000002 python36!_PyFunction_FastCallDict+0x5d [c:\build\cpython36\python\ceval.c @ 4972]
26 06fed6e8 77d77d53 086a9e88 06fed710 00000002 python36!_PyObject_FastCallDict+0x61 [c:\build\cpython36\objects\abstract.c @ 2295]
27 06fed72c 77e32d86 086a23f0 77fbacc4 086dc020 python36!_PyObject_CallMethodIdObjArgs+0xa3 [c:\build\cpython36\objects\abstract.c @ 2780]
28 06fed76c 77e1018a 086dc020 00000000 00000000 python36!PyImport_ImportModuleLevelObject+0x236 [c:\build\cpython36\python\import.c @ 1592]
29 06fed79c 77db3596 0867c480 087118d0 00000000 python36!builtin___import__+0x6a [c:\build\cpython36\python\bltinmodule.c @ 231]
2a 06fed7c8 77db370e 77e10120 086a7c30 00000001 python36!_PyCFunction_FastCallDict+0x166 [c:\build\cpython36\objects\methodobject.c @ 231]
2b 06fed7ec 77e19407 08678b20 086a7c30 00000001 python36!_PyCFunction_FastCallKeywords+0x3e [c:\build\cpython36\objects\methodobject.c @ 295]
2c 06fed81c 77e14d10 00000000 08763498 086a7af0 python36!call_function+0xf7 [c:\build\cpython36\python\ceval.c @ 4788]
2d 06fed898 77e185a5 086a7af0 00000000 08763498 python36!_PyEval_EvalFrameDefault+0xae0 [c:\build\cpython36\python\ceval.c @ 3277]
2e (Inline) -------- -------- -------- -------- python36!PyEval_EvalFrameEx+0x13 [c:\build\cpython36\python\ceval.c @ 718]
2f 06fed8e4 77e52ac6 086db960 00000000 00000000 python36!_PyEval_EvalCodeWithName+0x735 [c:\build\cpython36\python\ceval.c @ 4119]
30 (Inline) -------- -------- -------- -------- python36!PyEval_EvalCodeEx+0x25 [c:\build\cpython36\python\ceval.c @ 4140]
31 (Inline) -------- -------- -------- -------- python36!PyEval_EvalCode+0x25 [c:\build\cpython36\python\ceval.c @ 695]
32 06fed928 77e528a7 086db960 086db960 00000000 python36!run_mod+0x46 [c:\build\cpython36\python\pythonrun.c @ 980]
33 06fed94c 77e53956 51e8bae4 00000101 086db960 python36!PyRun_StringFlags+0xa7 [c:\build\cpython36\python\pythonrun.c @ 904]
*** WARNING: Unable to verify checksum for C:\Program Files (x86)\Windows Kits\10\Debuggers\x86\winext\pykd.dll
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Program Files (x86)\Windows Kits\10\Debuggers\x86\winext\pykd.dll -
34 06fed968 51e5c007 51e8bae4 00000101 086db960 python36!PyRun_String+0x16 [c:\build\cpython36\python\pythonrun.c @ 1510]
WARNING: Stack unwind information not available. Following frames may be wrong.
35 06fed9a0 51e5ae2e 51e62410 08407cd8 00000000 pykd+0xc007
36 06fed9c0 775d65be 00000000 08407cd8 00000000 pykd+0xae2e
37 06fed9d8 775d6fa6 00000000 00000001 08407cd8 dbgeng!ExtensionInfo::Unload+0x77
38 06fed9f4 775d558f 00000001 169b75fe 04733b10 dbgeng!ExtensionInfo::Delete+0x1f
39 06fede50 7760e8d3 00000000 00000000 00000000 dbgeng!ParseBangCmd+0x3a1
3a 06fedecc 7760f712 169b7482 04733b10 00000001 dbgeng!ProcessCommands+0x816
3b 06fedf2c 7755e0cf 00000000 169b483a 00000000 dbgeng!ProcessCommandsAndCatch+0xad
3c 06fee394 7755e2a8 0000000a 00000000 169b4876 dbgeng!Execute+0x247
3d 06fee3d8 00134bd7 04733b18 00000001 06fee7b8 dbgeng!DebugClient::ExecuteWide+0x68
3e 06fee794 00135068 ffffffff 00000008 ffffff00 windbg!ProcessCommand+0x12f
3f 06fef7b0 001372d1 65386ba8 00136d60 00136d60 windbg!ProcessEngineCommands+0xd0
40 06fef7ec 75938744 00000000 75938720 96b05a2a windbg!EngineLoop+0x571
41 06fef800 76f22de6 00000000 54905a86 00000000 KERNEL32!BaseThreadInitThunk+0x24
42 06fef848 76f22db6 ffffffff 76f44749 00000000 ntdll!__RtlUserThreadStart+0x2f
43 06fef858 00000000 00136d60 00000000 00000000 ntdll!_RtlUserThreadStart+0x1b

```
Comments: ** Comment from web user: poizan42 **

Ah, so there was a new version released a week ago. It was 2.0.0.8 that I had that problem with, it is indeed fixed in 2.0.0.10.

Feel free to close this issue.