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Thu, 13 Apr 2023 13:12:25 +0200 Received: from oxbe11.tb.ukmail.iss.as9143.net ([172.25.160.142]) by smtp3.tb.ukmail.iss.as9143.net with ESMTP id musLpr1y1vML8musLpSvJp; Thu, 13 Apr 2023 13:12:25 +0200 X-Env-Mailfrom: p.w.stephenson@ntlworld.com X-Env-Rcptto: zsh-workers@zsh.org X-SourceIP: 172.25.160.142 X-CNFS-Analysis: v=2.4 cv=NuYXMeRJ c=1 sm=1 tr=0 ts=6437e399 cx=a_exe a=SbParRoiaCP7T9pO5d2WBA==:117 a=wbvTLvLwOfMA:10 a=IkcTkHD0fZMA:10 a=NLZqzBF-AAAA:8 a=JQM2dfNow8zucO7g1KgA:9 a=QEXdDO2ut3YA:10 a=RchoEgWomvYJfgJ0MydD:22 X-Authenticated-Sender: p.w.stephenson@ntlworld.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ntlworld.com; s=meg.feb2017; t=1681384345; bh=FXalZvEvVXemMZQMWbujUDePzd1MDWpAgPdU3gjOM9Y=; h=Date:From:To:In-Reply-To:References:Subject; b=vqx7FKRVASp3weFi6EfAoC+klzDH20FhhBHis/BlwTD+7rs24upuMlj3pg8Gagd6J vGfGcLmF0G9DLw4+n65MzN4J85zz6v31K1WupYZmUHPdqJSGbmQq7mt3b3mRwOThww Og9ntH41/FQ6nxtm2v1jj/+a/OP2huC5j+9WeZp/vsM85H+qPs3TlFqluoRqW1LES6 sf+ZEF6ltH+sWQz9kHaJXPd68IDzDth3WGRgwy3Xw9GHTFi1WuD4prasesyzpX8tlM 7o5ovVZkzIo/DP2pAJN/Ex4ClBKe2/2GmOhm0LoiQQLw+VIXPyRnCaOgx09s+O3XAW Y7LSDAbJNM8QA== Date: Thu, 13 Apr 2023 12:12:25 +0100 (BST) From: Peter Stephenson To: zsh-workers@zsh.org Message-ID: <1621107110.4161180.1681384345108@mail.virginmedia.com> In-Reply-To: <267594676.4158370.1681382869709@mail.virginmedia.com> References: <48A7DCE2-AEC1-4777-949C-50917EDCECB1@kba.biglobe.ne.jp> <5C4788C8-4E40-4565-AFE8-84D57949BC8C@ntlworld.com> <267594676.4158370.1681382869709@mail.virginmedia.com> Subject: Re: Probabilistic crash on zsh 5.9 on x86_64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Priority: 3 Importance: Normal X-Mailer: Open-Xchange Mailer X-Originating-IP: 147.161.167.85 X-Originating-Client: open-xchange-appsuite X-CMAE-Envelope: MS4xfEbTEHpO35ZUMUGtqLx1QszlEtIvQEkvkaZUS2HXSDcNf1R0PHDGckQ6HySze3oDOL3jdqFZXXDJ1Rqz1oiXj179UVThhr9HQY6tnotURz4pdquXIh1+ Gqpr2EJX+qHsTssxtRrtLzFQRsk/3o8EGeJnHbTZPACVgvOKf6YgFu3FQN3xgruXRFONlT6x39NIZpOEjKoEWr2U3iZ0VpL5bn2whr2WgncLSA35CINpTBr9 X-Seq: 51645 Archived-At: X-Loop: zsh-workers@zsh.org Errors-To: zsh-workers-owner@zsh.org Precedence: list Precedence: bulk Sender: zsh-workers-request@zsh.org X-no-archive: yes List-Id: List-Help: , List-Subscribe: , List-Unsubscribe: , List-Post: List-Owner: List-Archive: > On 13/04/2023 11:47 Peter Stephenson wrote: > > On 11/04/2023 17:29 Peter Stephenson wrote: > > This indicates something is wrong with the reference counting: > > it shouldn't be possible for a shell code chunk to be visible > > to the user without it being marked as having at least one reference. > > This should reliably pick up the problem, though it needs tracing back > to where the function is set up. "watch" says the real culprit is this unsettrap() in starttrapscope(). I guess the save and restore action here needs a corresponding useeprog / freeprog, not sure the best way of doing that yet. /* * SIGEXIT needs to be restored at the current locallevel, * so give it the next higher one. dosavetrap() is called * automatically where necessary. */ if (sigtrapped[SIGEXIT] && !exit_trap_posix) { locallevel++; unsettrap(SIGEXIT); locallevel--; } pws