Got ya, thanks for the links and advice, big help. I'll try an M89 if the 
88 fails. 

On Monday, March 22, 2021 at 11:58:39 AM UTC-5 Jakob Kummerow wrote:

> See omahaproxy.appspot.com for current versions on various channels. Also 
> see https://v8.dev/docs/version-numbers (that's meant for embedding V8 
> directly, but the core points apply to your case as well).
>
> 88.0.4324.182 is a much better basis to start from, because at least it's 
> a Stable build. That said, M88 is outdated; if anyone finds a bug in it, 
> the answer will be "update to M89 and report back". Whether any M89 bugs 
> will still be fixed at this point depends on their severity (and the 
> intrusiveness of the fix).
>
>
> On Mon, Mar 22, 2021 at 5:50 PM Timothy Lee <tlee...@gmail.com> wrote:
>
>> I'm building a newer version to see how it goes, we can't use a beta 
>> version or tip version, any thoughts on a good stable version to build? I'm 
>> in the middle of a 88.0.4324.182 build but I'm not sure that is any better. 
>> I've had a hard time determining what should be a good version to build 
>> arm64.
>>
>> Thanks for the response!
>>
>> On Monday, March 22, 2021 at 11:14:13 AM UTC-5 Jakob Kummerow wrote:
>>
>>> 87.0.4272.0 was some random daily snapshot (from ~half a year ago) and 
>>> may well be buggy.
>>>
>>> Does this still happen with a current version, such as 90.0.4430.0 (M90 
>>> Beta) or tip-of-tree (currently: 91.0.4455.0)?
>>>
>>>
>>> On Mon, Mar 22, 2021 at 3:17 PM Timothy Lee <tlee...@gmail.com> wrote:
>>>
>>>> headless_shell: 87.0.4272.0
>>>> chromedriver: 87.0.4272.0
>>>>
>>>> Using selenium python and chromedriver to join a Zoom audio/video 
>>>> meeting using headless_shell compiled for arm64. headless_shell crashes at 
>>>> what appears to me to be v8/src/codegen/arm64/macro-assembler-arm64.cc in 
>>>> UseScratchRegisterScope::AcquireNextAvailable(CPURegLIst* available).  It 
>>>> appears to crash always at the point of having joined the meeting and 
>>>> before I start audio or video. From the debug output attached can anyone 
>>>> tell if that is really what is crashing or maybe I'm reading it wrong? The 
>>>> failure appears to be:
>>>>
>>>> # Fatal error in , line 0
>>>> # Check failed: !available->IsEmpty().
>>>>
>>>> The only place I found the above check in is the referenced method. Any 
>>>> ideas on what could ultimately be causing the issue?
>>>>
>>>> [0321/225438.515476:VERBOSE1:connection.cc(791)] 
>>>> Conn[3c023520:0:Net[any:0.0.0.x/0:Wildcard:id=0]:tSHjfzkY:1:0:prflx:udp:4.59.156.x:8466->QXdZ3Bla:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> UpdateState(), ms since last received response=745, ms since last received 
>>>> data=1845, rtt=100, pings_since_last_response=
>>>> [0321/225438.532021:VERBOSE1:connection.cc(791)] 
>>>> Conn[3c01d610:0:Net[any:0.0.0.x/0:Wildcard:id=0]:5wC2vpwE:1:0:prflx:udp:4.59.156.x:8466->INXF9k6M:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> UpdateState(), ms since last received response=747, ms since last received 
>>>> data=1844, rtt=100, pings_since_last_response=
>>>> [0321/225438.766044:VERBOSE1:connection.cc(791)] 
>>>> Conn[3c023520:0:Net[any:0.0.0.x/0:Wildcard:id=0]:tSHjfzkY:1:0:prflx:udp:4.59.156.x:8466->QXdZ3Bla:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> UpdateState(), ms since last received response=996, ms since last received 
>>>> data=2096, rtt=100, pings_since_last_response=
>>>> [0321/225438.766435:VERBOSE1:connection.cc(853)] 
>>>> Conn[3c023520:0:Net[any:0.0.0.x/0:Wildcard:id=0]:tSHjfzkY:1:0:prflx:udp:4.59.156.x:8466->QXdZ3Bla:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> Sending STUN ping, id=6d5a77546141325033436c6a, nomination=0
>>>> [0321/225438.767092:VERBOSE1:connection.cc(1168)] 
>>>> Conn[3c023520:0:Net[any:0.0.0.x/0:Wildcard:id=0]:tSHjfzkY:1:0:prflx:udp:4.59.156.x:8466->QXdZ3Bla:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> Sent STUN BINDING request, id=6d5a77546141325033436c6a, use_candidate=1, 
>>>> nomination=0
>>>> [0321/225438.773630:VERBOSE1:connection.cc(1083)] 
>>>> Conn[3c023520:0:Net[any:0.0.0.x/0:Wildcard:id=0]:tSHjfzkY:1:0:prflx:udp:4.59.156.x:8466->QXdZ3Bla:1:2013266431:local:udp:23.23.115.x:8801|CRWI|S|0|0|7926369428764099582|7]:
>>>>  
>>>> Received STUN BINDING response, id=6d5a77546141325033436c6a, code=0, 
>>>> rtt=7, 
>>>> pings_since_last_response=6d5a77546141325033436c6a 
>>>> [0321/225438.773943:VERBOSE1:connection.cc(398)] 
>>>> Conn[3c023520:0:Net[any:0.0.0.x/0:Wildcard:id=0]:tSHjfzkY:1:0:prflx:udp:4.59.156.x:8466->QXdZ3Bla:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> set_state
>>>> [0321/225438.783231:VERBOSE1:connection.cc(791)] 
>>>> Conn[3c01d610:0:Net[any:0.0.0.x/0:Wildcard:id=0]:5wC2vpwE:1:0:prflx:udp:4.59.156.x:8466->INXF9k6M:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> UpdateState(), ms since last received response=998, ms since last received 
>>>> data=2095, rtt=100, pings_since_last_response=
>>>> [0321/225438.783572:VERBOSE1:connection.cc(853)] 
>>>> Conn[3c01d610:0:Net[any:0.0.0.x/0:Wildcard:id=0]:5wC2vpwE:1:0:prflx:udp:4.59.156.x:8466->INXF9k6M:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> Sending STUN ping, id=6e384a576f342b61416d7245, nomination=0
>>>> [0321/225438.783922:VERBOSE1:connection.cc(1168)] 
>>>> Conn[3c01d610:0:Net[any:0.0.0.x/0:Wildcard:id=0]:5wC2vpwE:1:0:prflx:udp:4.59.156.x:8466->INXF9k6M:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> Sent STUN BINDING request, id=6e384a576f342b61416d7245, use_candidate=1, 
>>>> nomination=0
>>>> [0321/225438.790282:VERBOSE1:connection.cc(1083)] 
>>>> Conn[3c01d610:0:Net[any:0.0.0.x/0:Wildcard:id=0]:5wC2vpwE:1:0:prflx:udp:4.59.156.x:8466->INXF9k6M:1:2013266431:local:udp:23.23.115.x:8801|CRWI|S|0|0|7926369428764099582|7]:
>>>>  
>>>> Received STUN BINDING response, id=6e384a576f342b61416d7245, code=0, 
>>>> rtt=7, 
>>>> pings_since_last_response=6e384a576f342b61416d7245 
>>>> [0321/225438.790599:VERBOSE1:connection.cc(398)] 
>>>> Conn[3c01d610:0:Net[any:0.0.0.x/0:Wildcard:id=0]:5wC2vpwE:1:0:prflx:udp:4.59.156.x:8466->INXF9k6M:1:2013266431:local:udp:23.23.115.x:8801|CRWS|S|0|0|7926369428764099582|7]:
>>>>  
>>>> set_state
>>>>
>>>>
>>>> #
>>>> # Fatal error in , line 0
>>>> # Check failed: !available->IsEmpty().
>>>> #
>>>> #
>>>> #
>>>> #FailureMessage Object: 0xffff7e630df0#0 0xaaaac88d225c 
>>>> (/opt/chromium/chromium-browser+0x453f25b)
>>>> #1 0xaaaac885b87c (/opt/chromium/chromium-browser+0x44c887b)
>>>> #2 0xaaaac9da5c14 (/opt/chromium/chromium-browser+0x5a12c13)
>>>> #3 0xaaaac9cccf78 (/opt/chromium/chromium-browser+0x5939f77)
>>>> #4 0xaaaac822400c (/opt/chromium/chromium-browser+0x3e9100b)
>>>> #5 0xaaaac818cee8 (/opt/chromium/chromium-browser+0x3df9ee7)
>>>> #6 0xaaaac818d7f0 (/opt/chromium/chromium-browser+0x3dfa7ef)
>>>> #7 0xaaaac818c4d4 (/opt/chromium/chromium-browser+0x3df94d3)
>>>> #8 0xaaaac8168ad0 (/opt/chromium/chromium-browser+0x3dd5acf)
>>>> #9 0xaaaac81568a8 (/opt/chromium/chromium-browser+0x3dc38a7)
>>>> #10 0xaaaac815579c (/opt/chromium/chromium-browser+0x3dc279b)
>>>> #11 0xaaaac81a3b7c (/opt/chromium/chromium-browser+0x3e10b7b)
>>>> #12 0xaaaac81a3904 (/opt/chromium/chromium-browser+0x3e10903)
>>>> #13 0xaaaac81c3ff4 (/opt/chromium/chromium-browser+0x3e30ff3)
>>>> #14 0xaaaac81c7d64 (/opt/chromium/chromium-browser+0x3e34d63)
>>>> #15 0xaaaac9da6574 (/opt/chromium/chromium-browser+0x5a13573)
>>>> #16 0xaaaac88aea80 (/opt/chromium/chromium-browser+0x451ba7f)
>>>> #17 0xaaaac889adf0 (/opt/chromium/chromium-browser+0x4507def)
>>>> #18 0xaaaac88b0bc8 (/opt/chromium/chromium-browser+0x451dbc7)
>>>> #19 0xaaaac88b076c (/opt/chromium/chromium-browser+0x451d76b)
>>>> #20 0xaaaac88dfaec (/opt/chromium/chromium-browser+0x454caeb)
>>>> #21 0xaaaac88b029c (/opt/chromium/chromium-browser+0x451d29b)
>>>> #22 0xaaaac88bbe90 (/opt/chromium/chromium-browser+0x4528e8f)
>>>> #23 0xaaaac88bbb7c (/opt/chromium/chromium-browser+0x4528b7b)
>>>> #24 0xaaaac88e0334 (/opt/chromium/chromium-browser+0x454d333)
>>>> #25 0xffff88e3d038 (/lib/libpthread-2.23.so+0x7037)
>>>> [0321/225438.971073:VERBOSE1:dns_query.cc(184)] Not supporting parsing 
>>>> a DNS query with multiple questions.
>>>> [0321/225438.989159:WARNING:sync_reader.cc(171)] ASR: No room in socket 
>>>> buffer.: Broken pipe (32)
>>>> [0321/225438.990758:WARNING:sync_reader.cc(171)] ASR: No room in socket 
>>>> buffer.: Broken pipe (32)
>>>>
>>>>
>>>> Thank You!
>>>>
>>>>

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