Instrumented traffic-enabled specimen: wedged workers blocked (not spinning)
in WaitForSingleObject(sockListLock, INFINITE) inside tcludp event-source
procs (disassembly maps both wait sites to the sockListLock static; the
SocketThread released properly and parked on waitForSock). Handle-table data
from the full dump proves both tcludp global event objects were CloseHandle`d
mid-session: the statics still hold handle values now recycled to an
IoCompletion object and a manual-reset event (tcludp only creates auto-reset
events). Waiters starve forever on unsignalable objects. Only ExitSockets
closes these handles; the sole udp-loaded thread that died mid-session (run-1
shellfilter-run worker, terminated in the run transition) is the prime
trigger suspect. Console dependence dissolved - the CONIN$ restart was simply
the only mid-session udp-thread-death scenario. Minimal-repro die-variants
(release / terminate-mimic / full punk env) do not yet reproduce; next
candidates recorded (resultvar-terminate, thread::cancel, live CloseHandle
breakpoint).
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
