shinrich commented on issue #7780:
URL: https://github.com/apache/trafficserver/issues/7780#issuecomment-833073518
With the plugin symbols loaded the top of stack looks like this, pointing a
finger at the s3_auth plugin.
```
(gdb) bt
#0 0x00002b55c13eb3d7 in __GI_raise (sig=sig@entry=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:55
#1 0x00002b55c13ecac8 in __GI_abort () at abort.c:90
#2 0x00002b55be94561b in ink_abort
(message_format=message_format@entry=0x2b55be967c47 "%s:%d: failed assertion
`%s`") at ../../../../../../_vcs/trafficserver9.1/src/tscore/ink_error.cc:99
#3 0x00002b55be941b95 in _ink_assert (expression=expression@entry=0x7f135a
"!\"invalid mloc\"", file=file@entry=0x7ef508
"../../../../../_vcs/trafficserver9.1/src/traffic_server/InkAPI.cc",
line=line@entry=2117) at
../../../../../../_vcs/trafficserver9.1/src/tscore/ink_assert.cc:37
#4 0x0000000000505d80 in TSHandleMLocRelease (bufp=0x2b583c7f4828,
parent=<optimized out>, mloc=0x2b583c690308) at
../../../../../_vcs/trafficserver9.1/src/traffic_server/InkAPI.cc:2117
#5 0x00002b57d307f6e8 in ~S3Request (this=0x2b55c586fae0,
__in_chrg=<optimized out>) at
../../../../../_vcs/trafficserver9.1/plugins/s3_auth/s3_auth.cc:1027
#6 event_handler (cont=<optimized out>, event=<optimized out>,
edata=0x2b583c7f4000) at
../../../../../_vcs/trafficserver9.1/plugins/s3_auth/s3_auth.cc:997
#7 0x0000000000502ef0 in INKContInternal::handle_event(int, void*) () at
../../../../../_vcs/trafficserver9.1/src/traffic_server/InkAPI.cc:1137
#8 0x0000000000517117 in handleEvent (data=0x2b583c7f4000, event=60004,
this=0x2b57e5977080)
at
/home/shinrich/build-91/_build/build_release_posix-x86_64_gcc_8/trafficserver9.1/build/../../../../_vcs/trafficserver9.1/iocore/eventsystem/I_Continuation.h:219
#9 handleEvent (data=0x2b583c7f4000, event=60004, this=0x2b57e5977080)
at
/home/shinrich/build-91/_build/build_release_posix-x86_64_gcc_8/trafficserver9.1/build/../../../../_vcs/trafficserver9.1/iocore/eventsystem/I_Continuation.h:215
#10 APIHook::invoke(int, void*) const () at
../../../../../_vcs/trafficserver9.1/src/traffic_server/InkAPI.cc:1374
#11 0x000000000057ddd7 in HttpSM::state_api_callout(int, void*) () at
../../../../../../_vcs/trafficserver9.1/proxy/http/HttpSM.cc:1551
```
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