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Eglot, on of the more important >> `jsonrpc.el` clients (perhaps the most) is not affected, as far as I >> can tell. >> >> I already have a fix for this bug, but I am filing this report as a >> reference for the commit message and to collect comments. > > I've now pushed the fix to jsonrpc.el and tagged version 1.0.21 > of the jsonrpc package. > > I'd like to push some tests using the `jbug.py` test server > attached earlier. Is here a good place to store such helper scripts > in our test subtree? > > Jo=C3=A3o Thanks, should this bug be closed or is there more to do here?
bug-gnu-emacs@HIDDEN:bug#67945; Package emacs.
Full text available.Received: (at 67945) by debbugs.gnu.org; 21 Dec 2023 09:53:18 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Dec 21 04:53:18 2023 Received: from localhost ([127.0.0.1]:42441 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rGFjy-0000Nd-2E for submit <at> debbugs.gnu.org; Thu, 21 Dec 2023 04:53:18 -0500 Received: from mail-lj1-x229.google.com ([2a00:1450:4864:20::229]:60640) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <joaotavora@HIDDEN>) id 1rGFjs-0000NL-Hc for 67945 <at> debbugs.gnu.org; Thu, 21 Dec 2023 04:53:16 -0500 Received: by mail-lj1-x229.google.com with SMTP id 38308e7fff4ca-2cc55698c81so6448611fa.0 for <67945 <at> debbugs.gnu.org>; Thu, 21 Dec 2023 01:53:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1703152383; x=1703757183; darn=debbugs.gnu.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=UYZsRS3tkGBdYx/5HWSZ6oS6HInzTUxQEFZBQBTvJbM=; b=KqZbsRDZ8jmWDr7yAqO4kqMXiv6B2NfB07c3aNJDyA8DsGeTiRRuSndbyk3B14y/Rj 76ljB2ks+ZMrTug2+0+DgQWMrDc8c0gqLgf9WCY4zsQW7AI3zoR8ew+TS5mp2HEKdZZj V/ImcRQu21U7EauDeUTOtta85AWMbKKF4VAmk1VRtEMT0UI1nXqOZ3I7pmzqEkkQp7yr Z9P86n/5pUDL5o5dW81wgtrdqR8gHV0KlYEA8HZZishFupW2N6jUqtkaq+bKwcvwTv+Z Ih9ESzO5ggGUD5366cS45KR4E0ms1q5G0VMo2YHXbPS/PiTMNFlyk9qcZ/XO59gOn4UF nKEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703152383; x=1703757183; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=UYZsRS3tkGBdYx/5HWSZ6oS6HInzTUxQEFZBQBTvJbM=; b=PP84gehB5aumVLoAi1Vx6ch+MkKq6Xxy5bUX0HL5wksvMOxfBBTGgUQmUTIG1UydY5 NIp4u7gAmooFYv5wD1wpa7AA9QIO5USrnEnd7jhYom2+b1GUuutgjy+p31W/k2GW28eD KcoYLxb3LHRkxNDASrgQa6WQNMVslmHZ82YLQW8VBNCQV+a7uFGLkyz3RqRD4ZO287WL Oca2Ed9n0+NyMl/c3T2r8uL6b3+MlcWRpFBaret44Vop952nsoVtFvkVP8R5v8Ektdj6 dYgm3bOfQ6314SamfD1iHG7fPi9TZa8kXHQL/oqyQmP0qu3gR7FC9AqcLFVZ8fV2uTEE brlw== X-Gm-Message-State: AOJu0YyoaXZcgj7LJHbNGx2mKmV14XSL0j+DOc0r1KMu0ZKUay3ko4Qo IElLiuoIElCS5EugPRw+/Xs5OYRADlYLbzd2KEyUabM2 X-Google-Smtp-Source: AGHT+IGiXOtKi/wZx2lFWvz7f6ce3NkPP/0NhdI7I4bEbL6dp9r9z1OaRE7AF0iD6hjvsDG8dlVNxkvAvhEoPXLZgIo= X-Received: by 2002:a05:651c:207:b0:2cc:7127:ebb1 with SMTP id y7-20020a05651c020700b002cc7127ebb1mr3437392ljn.81.1703152382671; Thu, 21 Dec 2023 01:53:02 -0800 (PST) MIME-Version: 1.0 References: <CALDnm53_BRvk4iN0udHkEFaZ7Ehcup9MeVBMgnEtCXi1ZHbT3A@HIDDEN> <CALDnm517x1vGm_di6VxFDfz1AkCcL=YEQGr6TvX5jTTWu7-3KA@HIDDEN> <834jgcgfif.fsf@HIDDEN> In-Reply-To: <834jgcgfif.fsf@HIDDEN> From: =?UTF-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN> Date: Thu, 21 Dec 2023 09:52:51 +0000 Message-ID: <CALDnm50V292dTBa77tC5YuobqxDnce-r-xUjimh_YaM2NMjRJw@HIDDEN> Subject: Re: bug#67945: 30.0.50; Jsonrpc trouble dealing with nested synchronous requests To: Eli Zaretskii <eliz@HIDDEN> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 67945 Cc: 67945 <at> debbugs.gnu.org, daniel@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On Thu, Dec 21, 2023 at 7:51=E2=80=AFAM Eli Zaretskii <eliz@HIDDEN> wrote: > > > From: Jo=C3=A3o T=C3=A1vora <joaotavora@HIDDEN> > > Date: Thu, 21 Dec 2023 01:01:44 +0000 > > > > I'd like to push some tests using the `jbug.py` test server > > attached earlier. Is here a good place to store such helper scripts > > in our test subtree? > > In the FOO-resources subdirectory (where FOO is the name of the test)? Yes, that was my idea too. Thanks for confirming.
bug-gnu-emacs@HIDDEN:bug#67945; Package emacs.
Full text available.Received: (at 67945) by debbugs.gnu.org; 21 Dec 2023 07:51:51 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Dec 21 02:51:51 2023 Received: from localhost ([127.0.0.1]:42324 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rGDqQ-0001mn-U5 for submit <at> debbugs.gnu.org; Thu, 21 Dec 2023 02:51:51 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:36254) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1rGDqK-0001mW-NK for 67945 <at> debbugs.gnu.org; Thu, 21 Dec 2023 02:51:49 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1rGDqB-0006xR-C8; Thu, 21 Dec 2023 02:51:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=MIME-version:References:Subject:In-Reply-To:To:From: Date; bh=rWHHVEdHAg/N66MeJuFTWLbNpACSoviKa1g43BfvZp4=; b=KKNgg/80JQQyQgqEDPI2 fqr4mOFmgh7wevB/ptNJzo91J+WwBIJmM9ceA788u7ejL9KHDJ/iGYjghCIvEExmqaJaX2ov/vStm lM4FbAQAtHVePUwQd1MrsFoAoQ6VMUX1K6xAkBE7ExR0/HG3sqmilfaPMg9J0pKqI54UcRCefci/X SWXeLZeX/Ql0l6+9W3qnIWfMUSEwEYV4j0NQNPDwl9WJWmRFa5nkZ1mA3QEtBKX7jFQxVHqFLjm2t g2GKjvbtSK5hO/Sczk4lQibeGsdHV8u/Yu6czT5cljiWH9+69qeyC3z59f/k3F5gzaoExIez/5bzo Ymqw9WpLd9oh9Q==; Date: Thu, 21 Dec 2023 09:51:20 +0200 Message-Id: <834jgcgfif.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: =?utf-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN> In-Reply-To: <CALDnm517x1vGm_di6VxFDfz1AkCcL=YEQGr6TvX5jTTWu7-3KA@HIDDEN> (message from =?utf-8?B?Sm/Do28gVMOhdm9yYQ==?= on Thu, 21 Dec 2023 01:01:44 +0000) Subject: Re: bug#67945: 30.0.50; Jsonrpc trouble dealing with nested synchronous requests References: <CALDnm53_BRvk4iN0udHkEFaZ7Ehcup9MeVBMgnEtCXi1ZHbT3A@HIDDEN> <CALDnm517x1vGm_di6VxFDfz1AkCcL=YEQGr6TvX5jTTWu7-3KA@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 67945 Cc: 67945 <at> debbugs.gnu.org, daniel@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: João Távora <joaotavora@HIDDEN> > Date: Thu, 21 Dec 2023 01:01:44 +0000 > > I'd like to push some tests using the `jbug.py` test server > attached earlier. Is here a good place to store such helper scripts > in our test subtree? In the FOO-resources subdirectory (where FOO is the name of the test)?
bug-gnu-emacs@HIDDEN:bug#67945; Package emacs.
Full text available.Received: (at 67945) by debbugs.gnu.org; 21 Dec 2023 01:02:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Dec 20 20:02:14 2023 Received: from localhost ([127.0.0.1]:42108 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rG7S0-0004cI-W6 for submit <at> debbugs.gnu.org; Wed, 20 Dec 2023 20:02:14 -0500 Received: from mail-lj1-x234.google.com ([2a00:1450:4864:20::234]:61655) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <joaotavora@HIDDEN>) id 1rG7Ru-0004bk-Uv for 67945 <at> debbugs.gnu.org; Wed, 20 Dec 2023 20:02:11 -0500 Received: by mail-lj1-x234.google.com with SMTP id 38308e7fff4ca-2cc8fd5d54bso2410071fa.2 for <67945 <at> debbugs.gnu.org>; Wed, 20 Dec 2023 17:02:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1703120516; x=1703725316; darn=debbugs.gnu.org; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=oW8iJt7/GcTJJQ8ThXU4YvyyHqnwn2SlTCFcCc2Pmok=; b=AnwRACWQNA5uVVSd/DfKPBMp35W/AWmywKXUzzWS997yiPxhb0ct0GFUzag8zS2KA3 LrvA7UTU0k4pFSNGfgbhWxX4BQymHT2JujpSSD9EhlZh+R2ilKmY0jCC1H0IGcI1N24+ vuFZyAg7c1n3CJaVXE68tHdk0dDRNvh3oibuYMGEBTUgHdyC95MVbQI672zdEEZvcH5m SwYTku7zfeKzYlLTtB4h14a3RfFuA7Q4AcYKDXCsm4RVeR+FeQ7TNvGr0YdPJJDQvQ4n 5BaAx860IPbkpl+lmbEWZfYP/qVPAJ7p/F518tQ+epRWPSjY+1hYtyTmjMKryrNA4ftb hTkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703120516; x=1703725316; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=oW8iJt7/GcTJJQ8ThXU4YvyyHqnwn2SlTCFcCc2Pmok=; b=H1gNclTvUnn1ST7cGafxDacYxarD/icJv16pXunLXr954wGpuwIe2DMFU0LHWz2kR6 WLgKlWwaBEN9WDJT0U29RoOoyOgrUf3NF8RpvY7waY7yTEZo8n6u4nkXhna3MlCohX1a EYNSLNJxvq16ZKWrFlHI+/R2JJ7wtLdOwycifJMba5pBJBIb5QfEqTcfTu9QcGy+AV5R mfF497nMZsFarX2MalV225KWR3NediMDFQTSMAti7LVwKBcTfOi+KjKUw2KfxWW5MZpu 61y+GTC70Y67hOEn/ha26dz4VytlLMC8v9/Psom1DcMbZtGSJrwXXJIOXdn8sEP4LDs/ goww== X-Gm-Message-State: AOJu0Yzmeg+x/8E1cUeO/pzLwJwr66CiWcD5ksVShN/SN5rPWqn3T1Kj lpF6Uhlu/eTZuBhNaE8ta1Qzg4x9l0P7waYnyyIwvGDM X-Google-Smtp-Source: AGHT+IHS62P/LtTi3j794uJdFDJjQWaQMjj6X19+ZMW3faNylghD6YdO1OHQc5bGBnyiFb8aYoMn208IEsjBncxlhZo= X-Received: by 2002:a2e:2416:0:b0:2cc:68ba:98a9 with SMTP id k22-20020a2e2416000000b002cc68ba98a9mr3810362ljk.41.1703120516316; Wed, 20 Dec 2023 17:01:56 -0800 (PST) MIME-Version: 1.0 References: <CALDnm53_BRvk4iN0udHkEFaZ7Ehcup9MeVBMgnEtCXi1ZHbT3A@HIDDEN> In-Reply-To: <CALDnm53_BRvk4iN0udHkEFaZ7Ehcup9MeVBMgnEtCXi1ZHbT3A@HIDDEN> From: =?UTF-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN> Date: Thu, 21 Dec 2023 01:01:44 +0000 Message-ID: <CALDnm517x1vGm_di6VxFDfz1AkCcL=YEQGr6TvX5jTTWu7-3KA@HIDDEN> Subject: Re: bug#67945: 30.0.50; Jsonrpc trouble dealing with nested synchronous requests To: 67945 <at> debbugs.gnu.org, daniel@HIDDEN Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 67945 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On Wed, Dec 20, 2023 at 11:31=E2=80=AFPM Jo=C3=A3o T=C3=A1vora <joaotavora@= gmail.com> wrote: > > Hi, > > I've come across a rather complicated bug in jsonrpc.el that affects a > certain class of JSON-RPC applications. Eglot, on of the more important > `jsonrpc.el` clients (perhaps the most) is not affected, as far as I > can tell. > > I already have a fix for this bug, but I am filing this report as a > reference for the commit message and to collect comments. I've now pushed the fix to jsonrpc.el and tagged version 1.0.21 of the jsonrpc package. I'd like to push some tests using the `jbug.py` test server attached earlier. Is here a good place to store such helper scripts in our test subtree? Jo=C3=A3o
bug-gnu-emacs@HIDDEN:bug#67945; Package emacs.
Full text available.Received: (at submit) by debbugs.gnu.org; 20 Dec 2023 23:30:58 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Dec 20 18:30:57 2023 Received: from localhost ([127.0.0.1]:42040 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rG61h-0002uo-46 for submit <at> debbugs.gnu.org; Wed, 20 Dec 2023 18:30:57 -0500 Received: from lists.gnu.org ([2001:470:142::17]:49708) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <joaotavora@HIDDEN>) id 1rG61d-0002eS-OB for submit <at> debbugs.gnu.org; Wed, 20 Dec 2023 18:30:55 -0500 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 <joaotavora@HIDDEN>) id 1rG61K-0006QN-GT for bug-gnu-emacs@HIDDEN; Wed, 20 Dec 2023 18:30:38 -0500 Received: from mail-lj1-x230.google.com ([2a00:1450:4864:20::230]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from <joaotavora@HIDDEN>) id 1rG61F-0004Yc-Nr for bug-gnu-emacs@HIDDEN; Wed, 20 Dec 2023 18:30:31 -0500 Received: by mail-lj1-x230.google.com with SMTP id 38308e7fff4ca-2cc794df8aaso1819141fa.0 for <bug-gnu-emacs@HIDDEN>; Wed, 20 Dec 2023 15:30:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1703115021; x=1703719821; darn=gnu.org; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=OAXT6G++/8lQKt6EvKIw1MZdvCMPSI308cvcfUEswa4=; b=TjsrrZP3POxtahdg141xKMp/zDxebL+5li1ArT9a2spSlwLHC5elqEXIiq27lndzsK D+Pqm9BSxPv5VGjrzas3kHMw3KkmSMzi9NJ60IL/jj+2gyQ0UdzXfNsklNXROAfo/2Nh Y2+8hhcnZKp+WUUmAcaS53Bv9AB0nT17JXvWJ00780v/UOTVP0lOAHVr8IYkjYge8Rkf CTgJrgSD7uhxceseTS1tRW/fQHFEKO/R484VPOHopVb65lncit9JxsFy/NdfnryPX/8l 8GZPnFMrcCBy7dpSGlzkkHhNboWBjwmtPMZ6Bn79tkSCJeA3ei115ECuVVo8oVgazRiV fMzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703115021; x=1703719821; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=OAXT6G++/8lQKt6EvKIw1MZdvCMPSI308cvcfUEswa4=; b=MV0dUvcRO8DsAZbiYQx9MZkeUrIMf8pVs16fgniLyg9LL5skDwzp0nDdzAWJCBE5Fw eETelaHl05Ba7PcCfwpCgzMhmYF1SptSiL+kNyf6VEN/AadYjoOUObvvukxU0ToSa2Eh RNQlRx7+rVvRN49n95/AjOaI1WG5G5Gt3Io++SQehgML7IwcYEpl7mf6IWS8Oyaj7DXl 24wIXak+KCncVXeBCWSyAjtOaR2s18/YzfMD3uBHQXtcFaY7YxVOuG/xtzM8HCltcwCF LD+SczBwUmsTPR480ZL9DUQoYSkqcxCNN8Cef5t64dbSlsTf7KueSbgzahyD/a1EgSki +vfQ== X-Gm-Message-State: AOJu0Yx4WbABgR9EBpsfF9ToJ8qbxcMNjwVDusEVHJ1+mLYqtFN+KSVs PUP4++t4zllO/7NYUmyGVRptdULYxvlI+N2gcVWSq+XqqMU= X-Google-Smtp-Source: AGHT+IHTu84EoHSS0RJJhgJq9ljfHc7AqYO0sTjE0Jd21PZtcQTLemaJKR5G0TfakXGVAuCgBFqbKlfJEouoc/3BBKc= X-Received: by 2002:a2e:9643:0:b0:2cc:5cf8:13d with SMTP id z3-20020a2e9643000000b002cc5cf8013dmr3838929ljh.102.1703115020938; Wed, 20 Dec 2023 15:30:20 -0800 (PST) MIME-Version: 1.0 From: =?UTF-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN> Date: Wed, 20 Dec 2023 23:30:08 +0000 Message-ID: <CALDnm53_BRvk4iN0udHkEFaZ7Ehcup9MeVBMgnEtCXi1ZHbT3A@HIDDEN> Subject: 30.0.50; Jsonrpc trouble dealing with nested synchronous requests To: "simon254--- via Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@HIDDEN>, Daniel Pettersson <daniel@HIDDEN> Content-Type: multipart/mixed; boundary="000000000000d5f06b060cf95da5" Received-SPF: pass client-ip=2a00:1450:4864:20::230; envelope-from=joaotavora@HIDDEN; helo=mail-lj1-x230.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 1.0 (+) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) --000000000000d5f06b060cf95da5 Content-Type: text/plain; charset="UTF-8" Hi, I've come across a rather complicated bug in jsonrpc.el that affects a certain class of JSON-RPC applications. Eglot, on of the more important `jsonrpc.el` clients (perhaps the most) is not affected, as far as I can tell. I already have a fix for this bug, but I am filing this report as a reference for the commit message and to collect comments. I was made aware of this bug by Daniel Pettersson, who is experimenting with integrating JSONRPC in his DAP client, dape.el. DAP's based transport protocol isn't really JSON-RPC based but jsonrpc.el can be accomodated to support it. However the bug can be triggered with a sufficiently insidious and plain JSON-RPC application. The attached files jbug.el and jbug.py worked on by Daniel and me demonstrate the problem. * jbug.py is a JSON-RPC server that upon receiving the ":ping"" request immediately notifies the client with a ":hello"" notification. Then it waits briefly 0.1 seconds before reponding to the ":ping" request with ":pong". * jbug.el is a JSON-RPC client that sends a ":ping" request and waits for a response. While waiting for that response, it receives the ":hello" notification and issues a synchronous second ":slow" request inside the notification handler. Both requests are synchronous and performed with the Elisp function 'jsonrpc-request' As the name implies, the server takes longer to answer the ":slow" request (about 0.5 seconds) Before the patch that I'm about to push, the response to the ":slow" request is never seen by the client. The notification handler, which runs in a timer, simply exists non-locally. The reasons for this are somewhat complicated, but now well understood. Briefly, the synchronicity of 'jsonrpc-request' is achieved by having 'accept-process-output' wrapped in a try-catch block. A continuation handler running in a timer will eventually throw to the catch tag, so the next form after 'jsonrpc-request' can be executed. During the wait, JSON-RPC notifications may come in and they often do, but in most JSON-RPC applications (Eglot, at least), the notification handlers don't issue what will become a nested 'jsonrpc-request'. And even if they were to do that, they would only run into this problem if that second inner request ends at a later time than the first request. In dape.el and in the jbug.el file attached, this can happen. The result will be that the outer catch tag of the first outer request is "thrown to" when the response arrives, but that also unwinds the stack of the second inner request, which leads to the application never seeing the response that will appear only later. In the fix I'm about to push, the solution is to record the nesting in an Elisp structure and prevent throwing to the outer request when its response arrives. Rather, we record that desired continuation to run only when the inner request has resolved fully. The throwing will happen only when we are back at the first outer requests's 'accept-process-output'. This makes both responses be seen by the JSON-RPC application, albeit in reverse order. I think this isn't a problem in real life, because from the jsonrpc.el programmer's perspective a blocking jsonrpc-request call is only meant to preserve the order of execution of the forms in which that call. It's _not_ the relative order of multiple "concurrent" 'jsonrpc-request' calls, because this concurrency isn't really defined in the single-threaded Elisp programming model. 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João Távora <joaotavora@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#67945; Package emacs.
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Copyright (C) 1999 Darren O. Benham,
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