ui_cycle: uid=0
STEP socket node named uicyc
STEP mkpeer UI(U0) S.a<->U0.downstream
STEP named U0 = u0
STEP mkpeer UI(U1) U0.upstream<->U1.downstream
STEP named U1 = u1
STEP rmhook uicyc:a (U0 survives with upstream only)
STEP connect U1.upstream<->U0.downstream -- RING CLOSED
STEP injecting FLOW message to u0:downstream ...
RESULT flow inject errno=62 (Too many levels of symbolic links)
EXIT=1

--- second patched run (fresh node names w0/w1, proves counter resets) ---
STEP injecting FLOW message to w0:downstream ...
RESULT flow inject errno=62 (Too many levels of symbolic links)
GUEST_STILL_UP
--- repeated runs + 10s idle: STILL_ALIVE_AFTER_3_RUNS_PLUS_10S, load 0.04 ---