From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 38FB8C83F1B for ; Wed, 16 Jul 2025 08:33:13 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ubxZP-00055N-RY; Wed, 16 Jul 2025 04:32:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ubxZI-000516-Dz for qemu-devel@nongnu.org; Wed, 16 Jul 2025 04:32:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ubxZE-0005ab-E9 for qemu-devel@nongnu.org; Wed, 16 Jul 2025 04:32:47 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752654760; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PFb4HEJSeyKMX7IqSneL6waLr0C5Osf3xxuDffuPHM0=; b=BtaUtvLJZozwxqCnV5EtocJLy7k14asfbHponYvVqQ1VP/NWAMyw+tFAi4jNBoAijeerej KxQLLnuKvs4NhCIi5LgHGDH2II6yiA5LHDK/qKSfd4PHtSgcKRoRcMKOkEF7IS37bSUdw0 UE3H99yn+2+mRFHyn/ThnNZhWZdUU2I= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-267-U3o5QyRuMkeHLqB--_ybzA-1; Wed, 16 Jul 2025 04:32:38 -0400 X-MC-Unique: U3o5QyRuMkeHLqB--_ybzA-1 X-Mimecast-MFC-AGG-ID: U3o5QyRuMkeHLqB--_ybzA_1752654757 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 64B1519560A5; Wed, 16 Jul 2025 08:32:37 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.45.242.6]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 0D8191955F16; Wed, 16 Jul 2025 08:32:37 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 51C8521E6A27; Wed, 16 Jul 2025 10:32:34 +0200 (CEST) From: Markus Armbruster To: John Snow Cc: Steve Sistare , qemu-devel , Cleber Rosa , Eric Blake , Paolo Bonzini , "Daniel P. Berrange" , Eduardo Habkost , Fabiano Rosas , Laurent Vivier , Philippe Mathieu-Daude Subject: Re: [PATCH V4 2/3] python: use qom-list-get In-Reply-To: (John Snow's message of "Tue, 15 Jul 2025 13:27:05 -0400") References: <1752164694-215567-1-git-send-email-steven.sistare@oracle.com> <1752164694-215567-3-git-send-email-steven.sistare@oracle.com> <871pqmwzqr.fsf@pond.sub.org> Date: Wed, 16 Jul 2025 10:32:34 +0200 Message-ID: <87zfd4v8m5.fsf@pond.sub.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.129.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org John Snow writes: > On Fri, Jul 11, 2025, 10:47=E2=80=AFAM Markus Armbruster wrote: [...] >> Exception ignored in: > 0x7fcfcd080d60> >> Traceback (most recent call last): >> File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/legacy.py", >> line 310, in __del__ >> self.close() >> File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/legacy.py", >> line 281, in close >> self._sync( >> File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/legacy.py", >> line 102, in _sync >> return self._aloop.run_until_complete( >> File "/usr/lib64/python3.13/asyncio/base_events.py", line 719, in >> run_until_complete >> return future.result() >> File "/usr/lib64/python3.13/asyncio/tasks.py", line 507, in wait_for >> return await fut >> File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/protocol.py", >> line 399, in disconnect >> await self._wait_disconnect() >> File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/protocol.py", >> line 719, in _wait_disconnect >> await all_defined_tasks # Raise Exceptions from the bottom half. >> File "/work/armbru/qemu/scripts/qmp/../../python/qemu/qmp/protocol.py", >> line 870, in _bh_loop_forever >> await async_fn() >> RuntimeError: cannot reuse already awaited coroutine >> > > Curious about this backtrace. It looks like something has gone > fundamentally wrong in the internals and the error is being raised by the > garbage collector which is not ideal. > > Can you help me reproduce this? Even if it's old/bad code, I don't want > python-qemu-qmp faulting like this. Reproducer for Fedora 41, current master c079d3a31e4: Run $ qemu-system-x86_64 -S -display none -chardev socket,id=3Dmon1,path=3D= test-qmp,server=3Don,wait=3Doff -mon mode=3Dcontrol,id=3Dqmp,chardev=3Dmon1 and $ scripts/qmp/qom-tree -s test-qmp >/dev/null Questions?