lidavidm commented on issue #40100:
URL: https://github.com/apache/arrow/issues/40100#issuecomment-1955390916
Ok. I think it's a virtual call:
```
**************************************************************
* FUNCTION
*
**************************************************************
undefined
?ToTable@FlightStreamReader@flight@arrow@@QEAA
assume GS_OFFSET = 0xff00000000
undefined AL:1 <RETURN>
0x18d540 548
?ToTable@FlightStreamReader@flight@arrow@@QEAA
Ordinal_548
XREF[4]: Entry Point(*),
?ToTable@FlightStreamReader@flight@arrow@@QEAA
FUN_18018d520:18018d52d(c),
18096cad4(*), 1809c53d0(*)
18018d540 40 55 PUSH RBP
18018d542 53 PUSH RBX
18018d543 56 PUSH RSI
18018d544 57 PUSH RDI
18018d545 41 56 PUSH R14
18018d547 48 8d 6c LEA RBP,[RSP + -0x37]
24 c9
18018d54c 48 81 ec SUB RSP,0xc0
c0 00 00 00
18018d553 48 c7 45 MOV qword ptr [RBP + -0x29],-0x2
d7 fe ff
ff ff
18018d55b 48 8b 05 MOV RAX,qword ptr [DAT_18098d388]
= 00002B992DDFA232h
26 fe 7f 00
18018d562 48 33 c4 XOR RAX,RSP
18018d565 48 89 45 27 MOV qword ptr [RBP + 0x27],RAX
18018d569 48 8b f2 MOV RSI,RDX
18018d56c 48 8b d9 MOV RBX,RCX
18018d56f 48 89 55 b7 MOV qword ptr [RBP + -0x49],RDX
18018d573 48 8b 01 MOV RAX,qword ptr [RCX]
18018d576 48 8d 55 df LEA RDX,[RBP + -0x21]
LAB_18018d57a
XREF[1]: 1808cc9e8(*)
18018d57a ff 50 30 CALL qword ptr [RAX + 0x30]
18018d57d 90 NOP
```
That'd make sense given the implementation:
https://github.com/apache/arrow/blob/11ef68d7dc2e15c81dfc75f4304070021ad42a1e/cpp/src/arrow/flight/client.cc#L113-L118
So I'd hazard that we have a nullptr or otherwise invalid reader here, and
instead of crashing we're just jumping to oblivion. That doesn't explain _how_
we got said reader...
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