maskit commented on pull request #7905:
URL: https://github.com/apache/trafficserver/pull/7905#issuecomment-851117541


   I get `403 Bad Request` response as expected, but I see assertion failure on 
the server side.
   ```
   curl --http1.1 -d aaa -X TRACE -kv https://localhost:8443/
   ```
   
   ```
   [May 31 10:47:33.781] [ET_NET 0] DEBUG: <HttpTransact.cc:2229 
(LookupSkipOpenServer)> (http_trans) Next action next; 
HttpTransact::HandleResponse
   [May 31 10:47:33.781] [ET_NET 0] DEBUG: <HttpSM.cc:7343 
(call_transact_and_set_next_state)> (http) [0] State Transition: 
SM_ACTION_API_CACHE_LOOKUP_COMPLETE -> SM_ACTION_ORIGIN_SERVER_OPEN
   [May 31 10:47:33.781] [ET_NET 0] DEBUG: <HttpSM.cc:4909 
(do_http_server_open)> (http_track) entered inside do_http_server_open ][ipv4]
   Fatal: HttpSM.cc:4912: failed assertion `vc && vc->thread == this_ethread()`
   2021-05-31 10:47:33.781348+0900 traffic_server[47798:868142] Fatal: 
HttpSM.cc:4912: failed assertion `vc && vc->thread == this_ethread()`
   Process 47798 stopped
   * thread #2, name = '[ET_NET 0]', stop reason = signal SIGABRT
       frame #0: 0x00007fff203e792e libsystem_kernel.dylib`__pthread_kill + 10
   libsystem_kernel.dylib`__pthread_kill:
   ->  0x7fff203e792e <+10>: jae    0x7fff203e7938            ; <+20>
       0x7fff203e7930 <+12>: movq   %rax, %rdi
       0x7fff203e7933 <+15>: jmp    0x7fff203e1ad9            ; cerror_nocancel
       0x7fff203e7938 <+20>: retq   
   Target 0: (traffic_server) stopped.
   (lldb) bt
   * thread #2, name = '[ET_NET 0]', stop reason = signal SIGABRT
     * frame #0: 0x00007fff203e792e libsystem_kernel.dylib`__pthread_kill + 10
       frame #1: 0x00007fff204165bd libsystem_pthread.dylib`pthread_kill + 263
       frame #2: 0x00007fff2036b411 libsystem_c.dylib`abort + 120
       frame #3: 0x0000000102f9241a 
libtscore.10.dylib`ink_abort(message_format="%s:%d: failed assertion `%s`") at 
ink_error.cc:99:3
       frame #4: 0x0000000102f87e97 
libtscore.10.dylib`::_ink_assert(expression="vc && vc->thread == 
this_ethread()", file="HttpSM.cc", line=4912) at ink_assert.cc:37:3
       frame #5: 0x00000001002f5188 
traffic_server`HttpSM::do_http_server_open(this=0x000000010d227b80, raw=false) 
at HttpSM.cc:4912:3
       frame #6: 0x0000000100360590 
traffic_server`HttpSM::set_next_state(this=0x000000010d227b80) at 
HttpSM.cc:7536:5
       frame #7: 0x00000001002eb7b3 
traffic_server`HttpSM::call_transact_and_set_next_state(this=0x000000010d227b80,
 f=0x0000000000000000)(HttpTransact::State*)) at HttpSM.cc:7345:3
       frame #8: 0x0000000100304130 
traffic_server`HttpSM::handle_api_return(this=0x000000010d227b80) at 
HttpSM.cc:1694:5
       frame #9: 0x0000000100301b7c 
traffic_server`HttpSM::state_api_callout(this=0x000000010d227b80, event=0, 
data=0x0000000000000000) at HttpSM.cc:1626:5
       frame #10: 0x00000001003536a6 
traffic_server`HttpSM::do_api_callout_internal(this=0x000000010d227b80) at 
HttpSM.cc:5317:10
       frame #11: 0x00000001002df58d 
traffic_server`HttpSM::do_api_callout(this=0x000000010d227b80) at 
HttpSM.cc:434:12
       frame #12: 0x000000010035dafb 
traffic_server`HttpSM::set_next_state(this=0x000000010d227b80) at 
HttpSM.cc:7379:5
       frame #13: 0x00000001002eb7b3 
traffic_server`HttpSM::call_transact_and_set_next_state(this=0x000000010d227b80,
 f=0x0000000000000000)(HttpTransact::State*)) at HttpSM.cc:7345:3
       frame #14: 0x0000000100304130 
traffic_server`HttpSM::handle_api_return(this=0x000000010d227b80) at 
HttpSM.cc:1694:5
       frame #15: 0x0000000100301b7c 
traffic_server`HttpSM::state_api_callout(this=0x000000010d227b80, event=0, 
data=0x0000000000000000) at HttpSM.cc:1626:5
       frame #16: 0x00000001003536a6 
traffic_server`HttpSM::do_api_callout_internal(this=0x000000010d227b80) at 
HttpSM.cc:5317:10
       frame #17: 0x00000001002df58d 
traffic_server`HttpSM::do_api_callout(this=0x000000010d227b80) at 
HttpSM.cc:434:12
       frame #18: 0x000000010035dafb 
traffic_server`HttpSM::set_next_state(this=0x000000010d227b80) at 
HttpSM.cc:7379:5
       frame #19: 0x00000001002eb7b3 
traffic_server`HttpSM::call_transact_and_set_next_state(this=0x000000010d227b80,
 f=0x0000000000000000)(HttpTransact::State*)) at HttpSM.cc:7345:3
       frame #20: 0x0000000100325d9a 
traffic_server`HttpSM::state_hostdb_lookup(this=0x000000010d227b80, event=500, 
data=0x000062a00000af80) at HttpSM.cc:2351:5
       frame #21: 0x00000001002de4bb 
traffic_server`HttpSM::main_handler(this=0x000000010d227b80, event=500, 
data=0x000062a00000af80) at HttpSM.cc:2708:5
       frame #22: 0x000000010000c173 
traffic_server`Continuation::handleEvent(this=0x000000010d227b80, event=500, 
data=0x000062a00000af80) at I_Continuation.h:219:12
       frame #23: 0x000000010096124d 
traffic_server`reply_to_cont(cont=0x000000010d227b80, r=0x000062a00000af80, 
is_srv=false) at HostDB.cc:503:9
       frame #24: 0x000000010095b8b9 
traffic_server`HostDBContinuation::do_dns(this=0x000000010a06cdc0) at 
HostDB.cc:1595:9
       frame #25: 0x0000000100961f5f 
traffic_server`HostDBContinuation::probeEvent(this=0x000000010a06cdc0, 
(null)=2, e=0x000062c000006520) at HostDB.cc:1511:3
       frame #26: 0x000000010000c173 
traffic_server`Continuation::handleEvent(this=0x000000010a06cdc0, event=2, 
data=0x000062c000006520) at I_Continuation.h:219:12
       frame #27: 0x0000000100f98683 
traffic_server`EThread::process_event(this=0x0000000109137800, 
e=0x000062c000006520, calling_code=2) at UnixEThread.cc:164:22
       frame #28: 0x0000000100f99e78 
traffic_server`EThread::execute_regular(this=0x0000000109137800) at 
UnixEThread.cc:273:11
       frame #29: 0x0000000100f9b3cc 
traffic_server`EThread::execute(this=0x0000000109137800) at 
UnixEThread.cc:364:11
       frame #30: 0x0000000100f95d0b 
traffic_server`spawn_thread_internal(a=0x0000607000007790) at Thread.cc:92:12
       frame #31: 0x00007fff204168fc libsystem_pthread.dylib`_pthread_start + 
224
       frame #32: 0x00007fff20412443 libsystem_pthread.dylib`thread_start + 15
   (lldb) f 5
   frame #5: 0x00000001002f5188 
traffic_server`HttpSM::do_http_server_open(this=0x000000010d227b80, raw=false) 
at HttpSM.cc:4912:3
      4909        SMDebug("http_track", "entered inside do_http_server_open 
][%.*s]", static_cast<int>(fam_name.size()), fam_name.data());
      4910      
      4911        NetVConnection *vc = ua_txn->get_netvc();
   -> 4912        ink_release_assert(vc && vc->thread == this_ethread());
      4913        pending_action = nullptr;
      4914      
      4915        // Clean up connection tracking info if any. Need to do it 
now so the selected group
   ```


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