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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