JosiahWI opened a new issue, #11819:
URL: https://github.com/apache/trafficserver/issues/11819
The issue was originally reported by TSan as a shutdown race. That report is
easily reproducible, but I don't have a TSan build right now to do so. There
were concerns it could be a false positive, but ASan happened to actually catch
it in the wild on CI. Here is the ASan report:
```
==6586==ERROR: AddressSanitizer: heap-use-after-free on address
0x604000001178 at pc 0x0000004ab418 bp 0x7ff4f57e1cc0 sp 0x7ff4f57e1cb0
READ of size 1 at 0x604000001178 thread T1 ([ET_NET 0])
#0 0x4ab417 in DbgCtl::on() const ../include/tsutil/DbgCtl.h:111
#1 0x725570 in PollCont::do_poll(long) ../src/iocore/net/PollCont.cc:89
#2 0x71d2bc in NetHandler::waitForActivity(long)
../src/iocore/net/NetHandler.cc:362
#3 0xd4b8c2 in EThread::execute_regular()
../src/iocore/eventsystem/UnixEThread.cc:307
#4 0xd4bddd in EThread::execute()
../src/iocore/eventsystem/UnixEThread.cc:358
#5 0xd48a44 in spawn_thread_internal
../src/iocore/eventsystem/Thread.cc:75
#6 0x7ff4f9db21c9 in start_thread (/lib64/libpthread.so.0+0x81c9)
#7 0x7ff4f9a0d8d2 in __GI___clone (/lib64/libc.so.6+0x398d2)
```
This is likely very nontrivial to fix.
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