amoeba commented on PR #49585:
URL: https://github.com/apache/arrow/pull/49585#issuecomment-5873010753
I can reproduce the crash locally so that's good. It looks like teardown is
triggering the normal unload of `arrow_flight_sql_odbc.dll` but there are three
threads still running and pointing into it? The segfault is:
```
(6534.5140): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
<Unloaded_arrow_flight_sql_odbc.dll>+0x661f80:
00007fff`92851f80 ?? ???
```
Three active threads are still inside the DLL:
```
0x9360 0x18 <Unloaded_arrow_flight_sql_odbc.dll>+0x661f80
(00007fff`92851f80)
0x5140 0x2a <Unloaded_arrow_flight_sql_odbc.dll>+0x661f80
(00007fff`92851f80)
0x6004 0x2c <Unloaded_arrow_flight_sql_odbc.dll>+0x661f80
(00007fff`92851f80)
```
<details>
<summary>Thread details</summary>
```
24 Id: 6534.9360 Suspend: 1 Teb: 00000088`4062c000 Unfrozen
# RetAddr : Args to Child
: Call Site
00 00007ff8`4df1c1ab : 00000088`41fff5e0 00007fff`9285191a
00000088`00000000 00000088`41fff4c0 : ntdll!NtWaitForAlertByThreadId+0x14
01 00007ff8`4b803f18 : 00000000`00000000 00000088`41fff620
00007fff`93f796f8 00000001`230c2b00 : ntdll!RtlSleepConditionVariableCS+0x14b
02 00007fff`92850691 : 00007fff`93f796c0 00007fff`93f796f8
00000088`41fff5e0 ffffffff`ff676980 : KERNELBASE!SleepConditionVariableCS+0x38
03 00007fff`93f796c0 : 00007fff`93f796f8 00000088`41fff5e0
ffffffff`ff676980 7fffffff`ffffffff :
<Unloaded_arrow_flight_sql_odbc.dll>+0x660691
04 00007fff`93f796f8 : 00000088`41fff5e0 ffffffff`ff676980
7fffffff`ffffffff 00000000`00000000 :
<Unloaded_arrow_flight_sql_odbc.dll>+0x1d896c0
05 00000088`41fff5e0 : ffffffff`ff676980 7fffffff`ffffffff
00000000`00000000 00000000`00000007 :
<Unloaded_arrow_flight_sql_odbc.dll>+0x1d896f8
06 ffffffff`ff676980 : 7fffffff`ffffffff 00000000`00000000
00000000`00000007 00000000`01036640 : 0x00000088`41fff5e0
07 7fffffff`ffffffff : 00000000`00000000 00000000`00000007
00000000`01036640 00000000`6aba7a43 : 0xffffffff`ff676980
08 00000000`00000000 : 00000000`00000007 00000000`01036640
00000000`6aba7a43 00000001`230c2b00 : 0x7fffffff`ffffffff
# 42 Id: 6534.5140 Suspend: 1 Teb: 00000088`4074e000 Unfrozen
# RetAddr : Args to Child
: Call Site
00 00007ff8`4ce7e957 : 00000000`00000000 00000000`00000000
00000000`00000000 00000000`00000000 :
<Unloaded_arrow_flight_sql_odbc.dll>+0x661f80
01 00007ff8`4df87c1c : 00000000`00000000 00000000`00000000
000004f0`fffffb30 000004d0`fffffb30 : KERNEL32!BaseThreadInitThunk+0x17
02 00000000`00000000 : 00000000`00000000 00000000`00000000
00000000`00000000 00000000`00000000 : ntdll!RtlUserThreadStart+0x2c
44 Id: 6534.6004 Suspend: 1 Teb: 00000088`40750000 Unfrozen
# RetAddr : Args to Child
: Call Site
00 00007ff8`4b832cdc : 00000000`00000098 00000000`00000024
00000000`00000001 00000000`00000000 : ntdll!NtDeviceIoControlFile+0x14
01 00007ff8`4b832596 : 00000000`00000001 00000000`00000002
00000000`00000000 000001aa`a8e102c8 : KERNELBASE!GetConsoleLangId+0xe8
02 00007ff8`4b7e522d : 00000000`00000002 00000000`00000000
00000000`00000000 00000000`400c0060 :
KERNELBASE!_KernelBaseBaseDllInitialize+0xd6
03 00007ff8`4e05dd5a : 00000000`00000000 00000000`00000030
000001aa`a8e10000 00000000`00000003 : KERNELBASE!KernelBaseDllInitialize+0xd
04 00007ff8`4df1ba53 : 000001aa`a8e10000 00000000`400c0062
00000000`00000024 00000000`00000030 : ntdll!LdrpCallInitRoutineInternal+0x22
05 00007ff8`4df1b7d7 : 000001aa`a8e17f50 00000088`407f8000
00000088`407f8000 00000000`00000000 : ntdll!LdrpCallInitRoutine+0x93
06 00007ff8`4df8b98b : 00000000`00000000 00000000`00000000
00000088`407f8000 00000000`00000000 : ntdll!LdrpInitializeThread+0x297
07 00007ff8`4df8b83a : 00000000`00000000 00007ff8`4df00000
00000088`407f8000 00000088`40750000 : ntdll!LdrpInitialize+0xa7
08 00007ff8`4df0854e : 00000088`433ff8f0 00000000`00000000
00000000`00000000 00000000`00000000 : ntdll!LdrpInitializeInternal+0x5a
09 00000000`00000000 : 00000000`00000000 00000000`00000000
00000000`00000000 00000000`00000000 : ntdll!LdrInitializeThunk+0xe
```
</details>
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