From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Noam Postavsky Newsgroups: gmane.emacs.bugs Subject: bug#30243: 26.0.91; Infinite recursion in `make-auto-save-file-name' for quoted filenames Date: Thu, 25 Jan 2018 20:46:18 -0500 Message-ID: <87h8r9mlxx.fsf@users.sourceforge.net> References: <87shaun9ix.fsf@users.sourceforge.net> <87po5ymqed.fsf@users.sourceforge.net> <874lnafeun.fsf@gmx.de> <87mv12m3q6.fsf@users.sourceforge.net> <877es528vp.fsf@gmx.de> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1516931113 30319 195.159.176.226 (26 Jan 2018 01:45:13 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 26 Jan 2018 01:45:13 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux) Cc: 30243@debbugs.gnu.org, Philipp Stephani To: Michael Albinus Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Fri Jan 26 02:45:08 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1eet4k-0007VF-Jk for geb-bug-gnu-emacs@m.gmane.org; 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Thu, 25 Jan 2018 17:46:21 -0800 (PST) Original-Received: from zebian ([45.2.119.34]) by smtp.googlemail.com with ESMTPSA id y128sm38647itb.43.2018.01.25.17.46.19 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 25 Jan 2018 17:46:20 -0800 (PST) In-Reply-To: (Noam Postavsky's message of "Thu, 25 Jan 2018 11:46:48 -0500") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:142525 Archived-At: Noam Postavsky writes: > On Thu, Jan 25, 2018 at 11:36 AM, Michael Albinus > wrote: > >> Emacs is frozen, and there is the error message in the shell Emacs is >> started from: >> >> emacs: malloc.c:2427: sysmalloc: Assertion `(old_top == initial_top >> (av) && old_size == 0) || ((unsigned long) (old_size) >= MINSIZE && >> prev_inuse (old_top) && ((unsigned long) old_end & (pagesize - 1)) >> == 0)' failed. >> Fatal error 6: Aborted > > Oh, that's what I got from `file-name-all-completions' before fixing > it. My guess is that it's due to stack overflow. Although it is a bit > strange to get heap corruption from stack usage, maybe a bad > interaction with the stack overflow recovery mechanism? It's not related to stack overflow recovery, it still happens with attempt-stack-overflow-recovery set to nil. The problem appears to be that we hit the limit in grow_specpdl(), and then call signal_error which does Ffuncall and then record_in_backtrace writes to specdl, this latter write is invalid since we failed to grow specdl before. Thus memory corruption, undefined behaviour, etc. #0 0x000000000063999d in record_in_backtrace (function=XIL(0xd9ea380), args=0xffef5b188, nargs=2) at ../../src/eval.c:2096 #1 0x000000000063b8c9 in Ffuncall (nargs=3, args=0xffef5b180) at ../../src/eval.c:2746 #2 0x000000000063b320 in call2 (fn=XIL(0xd9ea380), arg1=XIL(0x5250), arg2=XIL(0x1161fc03)) at ../../src/eval.c:2625 #3 0x00000000006381db in signal_or_quit (error_symbol=XIL(0x5250), data=XIL(0x1161fc03), keyboard_quit=false) at ../../src/eval.c:1565 #4 0x000000000063806d in Fsignal (error_symbol=XIL(0x5250), data=XIL(0x1161fc03)) at ../../src/eval.c:1514 #5 0x000000000057939a in xsignal (error_symbol=XIL(0x5250), data=XIL(0x1161fc03)) at ../../src/lisp.h:3861 #6 0x0000000000638704 in signal_error (s=0x75e388 "Variable binding depth exceeds max-specpdl-size", arg=XIL(0)) at ../../src/eval.c:1688 #7 0x00000000006398cd in grow_specpdl () at ../../src/eval.c:2080 (More stack frames follow...) Lisp Backtrace: "stringp" (0xfef5b398) "file-name-non-special" (0xfef5bb58) "file-newer-than-file-p" (0xfef5bf38) "apply" (0xfef5c130) "file-name-non-special" (0xfef5c6f8) "file-newer-than-file-p" (0xfef5c998) "apply" (0xfef5cb90) "file-name-non-special" (0xfef5d158) "file-newer-than-file-p" (0xfef5d3f8) "apply" (0xfef5d5f0) "file-name-non-special" (0xfef5dbb8) "file-newer-than-file-p" (0xfef5de58) "apply" (0xfef5e050) [...] > I'll take a look at the edebug problems later today. Turns out this is just Bug#10577. You can work around it by loading subr-x before instrumenting forms which use when-let*.