GNU bug report logs - #37950
27.0.50; File error regression

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; File error regression
Date: Mon, 28 Oct 2019 00:50:25 +0200

0. emacs -Q

1. in Dired type 'v' ('dired-view-file') to view a read-protected file, e.g.
   from non-root to visit a file with such permissions: -rw------- root root

2. Empty buffer is displayed (but the file size is several kilobytes)

3. The echo area displays the message:

   View mode: type C-h for help, h for commands, q to quit.

4. Visiting *Messages* reveals the error message:

   Note: file is write protected

obscured by the View mode message above.

But this error message is wrong anyway.  In previous versions
the error message was correct:

    find-file-noselect-1: File is not readable:

and it rightfully refused to visit the read-protected file.


In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.30)
 of 2019-10-27 built on localhost
Repository revision: c6667cc6a958e06fd43fb1ee0e80753adfefa49d
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Linux Mint 19

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Note: file is write protected
View mode: type C-h for help, h for commands, q to quit.

Configured using:
 'configure --with-x-toolkit=gtk3 --with-xwidgets --with-xft
 --with-modules --enable-checking=yes,glyphs
 --enable-check-lisp-object-type 'CFLAGS=-O0 -g3 -gdwarf-4''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GSETTINGS GLIB NOTIFY INOTIFY
GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS PDUMPER
LCMS2 GMP

Important settings:
  value of $LC_MONETARY: et_EE.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_DK.utf8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Message #10 received at 37950-done <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Juri Linkov <juri <at> linkov.net>
Cc: 37950-done <at> debbugs.gnu.org
Subject: Re: 27.0.50; File error regression
Date: Thu, 31 Oct 2019 23:39:07 -0700

[Message part 1 (text/plain, inline)]

Thanks for the bug report. That one's my fault, as it was due to this patch:

https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=ba0605779e0e207161441c08afdfac57ed603f69

which fixed a problem elsewhere but introduced a bug. I installed the attached 
patch to fix things.

[0001-Fix-insert-file-contents-file-error-regression.patch (text/x-patch, attachment)]

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