pony_os_peername crash

[SeanTAllen]

This one happened on Windows while doing some other testing. This is probably going to be hard to track down.

The failure happened during a net/Broadcast test. Release version of the stdlib. Using release runtime.

pony_os_peername is only used in TCPConnection/remote_address.

Nothing in the TCP tests called remote_address and I hadn't modified them to call it.

backtrace:

2023-09-05T07:56:32.9481536Z * thread #7, stop reason = Exception 0xc0000005 encountered at address 0x7ff6e3a7cb1b: Access violation reading location 0x000001d8
2023-09-05T07:56:32.9482605Z     frame #0: 0x00007ff6e3a7cb1b stdlib-release.exe`pony_os_peername + 4319260
2023-09-05T07:56:32.9483304Z stdlib-release.exe`pony_os_peername:
2023-09-05T07:56:32.9484078Z ->  0x7ff6e3a7cb1b <+4319260>: movq   0x18(%rdi,%rax), %rdx
2023-09-05T07:56:32.9484591Z     0x7ff6e3a7cb20 <+4319265>: movq   (%rdi,%rax), %rcx
2023-09-05T07:56:32.9485426Z     0x7ff6e3a7cb24 <+4319269>: callq  0x7ff6e3659156            ; pony_active_schedulers + 240
2023-09-05T07:56:32.9486122Z     0x7ff6e3a7cb29 <+4319274>: incl   %ebx
2023-09-05T07:56:32.9487178Z Process 6484 launched: 'D:\a\ponyc\ponyc\build\release\stdlib-release.exe' (x86_64)
2023-09-05T07:56:32.9487690Z (lldb) frame variable
2023-09-05T07:56:32.9488341Z (lldb) register read
2023-09-05T07:56:32.9489181Z General Purpose Registers:
2023-09-05T07:56:32.9489892Z        rax = 0x0000000000000000
2023-09-05T07:56:32.9490729Z        rbx = 0x0000000000000001
2023-09-05T07:56:32.9491418Z        rcx = 0x0000000000000000
2023-09-05T07:56:32.9492258Z        rdx = 0x0000000000000000
2023-09-05T07:56:32.9492919Z        rdi = 0x00000000000001C0
2023-09-05T07:56:32.9493716Z        rsi = 0x0000000000000002
2023-09-05T07:56:32.9494533Z        rbp = 0x00000000FFFFFFFF
2023-09-05T07:56:32.9495264Z        rsp = 0x000000DA3DAFF8C0
2023-09-05T07:56:32.9496119Z         r8 = 0x000000DA3DAFF858
2023-09-05T07:56:32.9496850Z         r9 = 0x00000000FFFFFFFF
2023-09-05T07:56:32.9500119Z        r10 = 0x0000000000000000
2023-09-05T07:56:32.9500575Z        r11 = 0x0000000000000246
2023-09-05T07:56:32.9501671Z        r12 = 0x0000000000000000
2023-09-05T07:56:32.9502454Z        r13 = 0x0000000000000000
2023-09-05T07:56:32.9503001Z        r14 = 0x000000DA3DAFFBE0
2023-09-05T07:56:32.9503293Z        r15 = 0x0000000000000000
2023-09-05T07:56:32.9504340Z        rip = 0x00007FF6E3A7CB1B  stdlib-release.exe`pony_os_peername + 4319260
2023-09-05T07:56:32.9504785Z     eflags = 0b0000000000000000000000000000000000000000000000010000001000010001
2023-09-05T07:56:32.9505602Z        eax = 0x00000000
2023-09-05T07:56:32.9506230Z        ebx = 0x00000001
2023-09-05T07:56:32.9507101Z        ecx = 0x00000000
2023-09-05T07:56:32.9508395Z        edx = 0x00000000
2023-09-05T07:56:32.9509246Z        edi = 0x000001C0
2023-09-05T07:56:32.9510028Z        esi = 0x00000002
2023-09-05T07:56:32.9510777Z        ebp = 0xFFFFFFFF
2023-09-05T07:56:32.9511474Z        esp = 0x3DAFF8C0
2023-09-05T07:56:32.9512292Z        r8d = 0x3DAFF858
2023-09-05T07:56:32.9512953Z        r9d = 0xFFFFFFFF
2023-09-05T07:56:32.9513785Z       r10d = 0x00000000
2023-09-05T07:56:32.9514512Z       r11d = 0x00000246
2023-09-05T07:56:32.9515232Z       r12d = 0x00000000
2023-09-05T07:56:32.9515980Z       r13d = 0x00000000
2023-09-05T07:56:32.9516780Z       r14d = 0x3DAFFBE0
2023-09-05T07:56:32.9517563Z       r15d = 0x00000000
2023-09-05T07:56:32.9518356Z         ax = 0x0000
2023-09-05T07:56:32.9519133Z         bx = 0x0001
2023-09-05T07:56:32.9519859Z         cx = 0x0000
2023-09-05T07:56:32.9520654Z         dx = 0x0000
2023-09-05T07:56:32.9521417Z         di = 0x01C0
2023-09-05T07:56:32.9522188Z         si = 0x0002
2023-09-05T07:56:32.9522994Z         bp = 0xFFFF
2023-09-05T07:56:32.9523700Z         sp = 0xF8C0
2023-09-05T07:56:32.9524658Z        r8w = 0xF858
2023-09-05T07:56:32.9525421Z        r9w = 0xFFFF
2023-09-05T07:56:32.9526115Z       r10w = 0x0000
2023-09-05T07:56:32.9526885Z       r11w = 0x0246
2023-09-05T07:56:32.9527644Z       r12w = 0x0000
2023-09-05T07:56:32.9528421Z       r13w = 0x0000
2023-09-05T07:56:32.9529104Z       r14w = 0xFBE0
2023-09-05T07:56:32.9529914Z       r15w = 0x0000
2023-09-05T07:56:32.9530620Z         ah = 0x00
2023-09-05T07:56:32.9531538Z         bh = 0x00
2023-09-05T07:56:32.9532484Z         ch = 0x00
2023-09-05T07:56:32.9533478Z         dh = 0x00
2023-09-05T07:56:32.9534377Z         al = 0x00
2023-09-05T07:56:32.9535541Z         bl = 0x01
2023-09-05T07:56:32.9538637Z         cl = 0x00
2023-09-05T07:56:32.9539980Z         dl = 0x00
2023-09-05T07:56:32.9540938Z        dil = 0xC0
2023-09-05T07:56:32.9543017Z        sil = 0x02
2023-09-05T07:56:32.9543887Z        bpl = 0xFF
2023-09-05T07:56:32.9545067Z        spl = 0xC0
2023-09-05T07:56:32.9546877Z        r8l = 0x58
2023-09-05T07:56:32.9548382Z        r9l = 0xFF
2023-09-05T07:56:32.9549078Z       r10l = 0x00
2023-09-05T07:56:32.9549769Z       r11l = 0x46
2023-09-05T07:56:32.9550485Z       r12l = 0x00
2023-09-05T07:56:32.9551188Z       r13l = 0x00
2023-09-05T07:56:32.9551866Z       r14l = 0xE0
2023-09-05T07:56:32.9552685Z       r15l = 0x00
2023-09-05T07:56:32.9553269Z 
2023-09-05T07:56:32.9554218Z (lldb) bt all
2023-09-05T07:56:32.9554913Z   thread #1
2023-09-05T07:56:32.9555744Z     frame #0: 0x00007ffaacd60714 ntdll.dll`NtDelayExecution + 20
2023-09-05T07:56:32.9556519Z     frame #1: 0x00007ffaacd17f4a ntdll.dll`RtlDelayExecution + 42
2023-09-05T07:56:32.9557369Z     frame #2: 0x00007ffaaa605d2b KernelBase.dll`SwitchToThread + 27
2023-09-05T07:56:32.9558127Z     frame #3: 0x00007ffaac3a083a ws2_32.dll`WahCreateHandleContextTable + 1418
2023-09-05T07:56:32.9558923Z     frame #4: 0x00007ffaac3a1116 ws2_32.dll`WahEnumerateHandleContexts + 262
2023-09-05T07:56:32.9559763Z     frame #5: 0x00007ffaac3a1230 ws2_32.dll`WSACleanup + 240
2023-09-05T07:56:32.9560706Z     frame #6: 0x00007ff6e3a85a0c stdlib-release.exe`pony_os_peername + 4355853
2023-09-05T07:56:32.9561409Z     frame #7: 0x00007ff6e39a03b6 stdlib-release.exe`pony_os_peername + 3416247
2023-09-05T07:56:32.9562725Z     frame #8: 0x00007ff6e3a75370 stdlib-release.exe`__scrt_common_main_seh [inlined] invoke_main at exe_common.inl:288
2023-09-05T07:56:32.9563450Z     frame #9: 0x00007ff6e3a7534e stdlib-release.exe`__scrt_common_main_seh at exe_common.inl:288
2023-09-05T07:56:32.9564486Z     frame #10: 0x00007ffaaba24de0 kernel32.dll`BaseThreadInitThunk + 16
2023-09-05T07:56:32.9564872Z     frame #11: 0x00007ffaacd3ec4b ntdll.dll`RtlUserThreadStart + 43
2023-09-05T07:56:32.9565580Z   thread #3
2023-09-05T07:56:32.9566060Z     frame #0: 0x00007ffaacd63be4 ntdll.dll`NtWaitForWorkViaWorkerFactory + 20
2023-09-05T07:56:32.9566632Z     frame #1: 0x00007ffaacccb77f ntdll.dll`RtlInitializeResource + 2415
2023-09-05T07:56:32.9567700Z     frame #2: 0x00007ffaaba24de0 kernel32.dll`BaseThreadInitThunk + 16
2023-09-05T07:56:32.9568691Z     frame #3: 0x00007ffaacd3ec4b ntdll.dll`RtlUserThreadStart + 43
2023-09-05T07:56:32.9569414Z   thread #2
2023-09-05T07:56:32.9570293Z     frame #0: 0x00007ffaacd63be4 ntdll.dll`NtWaitForWorkViaWorkerFactory + 20
2023-09-05T07:56:32.9571406Z     frame #1: 0x00007ffaacccb77f ntdll.dll`RtlInitializeResource + 2415
2023-09-05T07:56:32.9572271Z     frame #2: 0x00007ffaaba24de0 kernel32.dll`BaseThreadInitThunk + 16
2023-09-05T07:56:32.9573005Z     frame #3: 0x00007ffaacd3ec4b ntdll.dll`RtlUserThreadStart + 43
2023-09-05T07:56:32.9573692Z   thread #8
2023-09-05T07:56:32.9574650Z     frame #0: 0x00007ffaacd63be4 ntdll.dll`NtWaitForWorkViaWorkerFactory + 20
2023-09-05T07:56:32.9575452Z     frame #1: 0x00007ffaacccb77f ntdll.dll`RtlInitializeResource + 2415
2023-09-05T07:56:32.9576236Z     frame #2: 0x00007ffaaba24de0 kernel32.dll`BaseThreadInitThunk + 16
2023-09-05T07:56:32.9577086Z     frame #3: 0x00007ffaacd3ec4b ntdll.dll`RtlUserThreadStart + 43
2023-09-05T07:56:32.9577998Z * thread #7, stop reason = Exception 0xc0000005 encountered at address 0x7ff6e3a7cb1b: Access violation reading location 0x000001d8
2023-09-05T07:56:32.9578826Z   * frame #0: 0x00007ff6e3a7cb1b stdlib-release.exe`pony_os_peername + 4319260
2023-09-05T07:56:32.9579509Z     frame #1: 0x00007ff6e3a80cd6 stdlib-release.exe`pony_os_peername + 4336087
2023-09-05T07:56:32.9580098Z     frame #2: 0x00007ffaacddde34 ntdll.dll`RtlSetIoCompletionCallback + 1060
2023-09-05T07:56:32.9586704Z     frame #3: 0x00007ffaacccb8e8 ntdll.dll`RtlInitializeResource + 2776
2023-09-05T07:56:32.9587364Z     frame #4: 0x00007ffaaba24de0 kernel32.dll`BaseThreadInitThunk + 16
2023-09-05T07:56:32.9587937Z     frame #5: 0x00007ffaacd3ec4b ntdll.dll`RtlUserThreadStart + 43
2023-09-05T07:56:32.9588542Z (lldb) quit 1
2023-09-05T07:56:33.0804005Z Test suites run: 2, num failed: 1
2023-09-05T07:56:33.0867017Z Test suites failed: (stdlib-release)