qa: tool_bench_sanity_check.py --bench=MempoolCheck failure #34248

1. 
   hebasto commented at 1:16 pm on January 10, 2026: member

   On NetBSD 10.1, https://github.com/hebasto/bitcoin-core-nightly/actions/runs/20872235098/job/59975888965:

    090/455 - tool_bench_sanity_check.py --bench=MempoolCheck failed, Duration: 26 s
    1
    2stdout:
    32026-01-10T04:19:37.691064Z TestFramework (INFO): PRNG seed is: 4615966168349338210
    42026-01-10T04:19:37.692250Z TestFramework (INFO): Initializing test directory /home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/test_runner_₿_🏃_20260110_041921/tool_bench_sanity_check_363
    52026-01-10T04:19:37.692513Z TestFramework (INFO): Starting: /home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/build/bin/bench_bitcoin -filter=MempoolCheck -sanity-check
    6Running with -sanity-check option, output is being suppressed as benchmark results will be useless.
    72026-01-10T04:19:38.567933Z TestFramework (INFO): Success!
    82026-01-10T04:20:03.637759Z TestFramework.utils (ERROR): wait_until() failed. Predicate: ''''
    9        wait_until_helper_internal(lambda: not self.network_event_loop.is_running(), timeout=timeout)
   10'''
   11
   12
   13stderr:
   14Traceback (most recent call last):
   15  File "/home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/build/test/functional/tool_bench_sanity_check.py", line 41, in <module>
   16    BenchSanityCheck(__file__).main()
   17    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
   18  File "/home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/test/functional/test_framework/test_framework.py", line 154, in main
   19    exit_code = self.shutdown()
   20  File "/home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/test/functional/test_framework/test_framework.py", line 281, in shutdown
   21    self.network_thread.close()
   22    ~~~~~~~~~~~~~~~~~~~~~~~~~^^
   23  File "/home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/test/functional/test_framework/p2p.py", line 749, in close
   24    wait_until_helper_internal(lambda: not self.network_event_loop.is_running(), timeout=timeout)
   25    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   26  File "/home/runner/work/bitcoin-core-nightly/bitcoin-core-nightly/test/functional/test_framework/util.py", line 420, in wait_until_helper_internal
   27    raise AssertionError("Predicate {} not true after {} seconds".format(predicate_source, timeout))
   28AssertionError: Predicate ''''
   29        wait_until_helper_internal(lambda: not self.network_event_loop.is_running(), timeout=timeout)
   30''' not true after 10.0 seconds
   

2. hebasto added the label Tests on Jan 10, 2026
3. 
   maflcko commented at 3:29 pm on January 10, 2026: member

   Not sure how this could happen. After https://github.com/bitcoin/bitcoin/commit/39ca01525977e5aab078198874f6bf035b552b3b , the test waits for the loop to be running, so a stop should always be called on a running loop and result in it eventually not running.

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