From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Chris Hunt Newsgroups: gmane.emacs.bugs Subject: bug#44642: 27.1; read-string does not signal on EOF after calling server-eval-at Date: Sat, 14 Nov 2020 11:46:42 -0500 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38902"; mail-complaints-to="usenet@ciao.gmane.io" To: 44642@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 14 19:16:17 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ke05w-0009zF-RX for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 14 Nov 2020 19:16:16 +0100 Original-Received: from localhost ([::1]:52072 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ke05v-0002cr-N8 for geb-bug-gnu-emacs@m.gmane-mx.org; 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That's all we know. 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 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Sat, 14 Nov 2020 13:15:32 -0500 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:193320 Archived-At: Running the following shell script demonstrates the bug: #+begin_src shell #!/bin/sh cd "$(mktemp -d)" export RPC_SERVER_NAME=3D"$PWD/emacs" emacs --quick "--fg-daemon=3D$RPC_SERVER_NAME" >stdout.log 2>stderr.log & sleep 1 cat < script.el (require 'server) (setq command (read-string "")) (message "Received '%s'" command) (when (string=3D command "test") (message "Sending request to server") (let ((result (server-eval-at (getenv "RPC_SERVER_NAME") "hello from server"))) (message "Response received from server '%s'" result))) ;; This should signal, since EOF. (read-string "") EOF echo '[script] test 1' echo notest | \ emacs --quick --batch --script "$PWD/script.el" echo '[script] test 1 complete' echo '[script] test 2' echo test | \ emacs --quick --batch --script "$PWD/script.el" echo '[script] test 2 complete' #+end_src Test 1 demonstrates the expected behavior, the second call to `read-string' results in an error and the non-daemon emacs process exits. Test 2 demonstrates the bug. When `server-eval-at' is called, the subsequent `read-string' does not result in an error, and does not appear to return. The non-daemon emacs process does not exit. On my machine, this outputs: #+begin_src text [script] test 1 Received =E2=80=99notest=E2=80=99 Error reading from stdin [script] test 1 complete [script] test 2 Received =E2=80=99test=E2=80=99 Sending request to server Response received from server =E2=80=99hello from server=E2=80=99 #+end_src and hangs. According to `top', the non-daemon process is consuming 100% of a CPU core. xbacktrace in gdb of the non-daemon emacs shows #+begin_src text "read-string" (0xb5783470) "eval-buffer" (0xb5783660) "load-with-code-conversion" (0xb5783928) "load" (0xb5783c18) "command-line-1" (0xb5784260) "command-line" (0xb5784ac8) "normal-top-level" (0xb5784e20) #+end_src Previously posted to https://emacs.stackexchange.com/q/61676/29147 and https://lists.gnu.org/archive/html/help-gnu-emacs/2020-11/msg00405.html In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30) of 2020-11-08 built on desktop Windowing system distributor 'The X.Org Foundation', version 11.0.11906000 System Description: Ubuntu 18.04.5 LTS Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Configured using: 'configure --prefix /home/chris/.local/evm/emacs-27.1 --without-gif' Configured features: XPM JPEG TIFF PNG SOUND DBUS GSETTINGS GLIB NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS PDUMPER GMP Important settings: value of $LANG: en_US.UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs text-property-search time-date subr-x seq byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 44962 7821) (symbols 48 5981 1) (strings 32 15464 1865) (string-bytes 1 512027) (vectors 16 10063) (vector-slots 8 131781 12876) (floats 8 19 27) (intervals 56 187 0) (buffers 1000 11))