GNU bug report logs - #40529
26.3; global-display-line-numbers-mode and flymake-show-diagnostics-buffer error

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Aidan Beggs <nadiasggeb001 <at> gmail.com>
Subject: bug#40529: closed (Re: bug#40529: 26.3; global-display-line-numbers-mode
 and flymake-show-diagnostics-buffer error)
Date: Mon, 13 Apr 2020 05:04:02 +0000

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Your bug report

#40529: 26.3; global-display-line-numbers-mode and flymake-show-diagnostics-buffer error

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 40529 <at> debbugs.gnu.org.

-- 
40529: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40529
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Aidan Beggs <nadiasggeb001 <at> gmail.com>
Cc: joaotavora <at> gmail.com, 40529-done <at> debbugs.gnu.org
Subject: Re: bug#40529: 26.3; global-display-line-numbers-mode and
 flymake-show-diagnostics-buffer error
Date: Mon, 13 Apr 2020 08:03:00 +0300

> From: Aidan Beggs <nadiasggeb001 <at> gmail.com>
> Date: Sun, 12 Apr 2020 16:45:18 -0400
> Cc: João Távora <joaotavora <at> gmail.com>, 
> 	40529 <at> debbugs.gnu.org
> 
> That patch seems to do the trick for me. I don't make particularly extensive use of the flymake diagnostics
> buffer, but for regular use it seems to work as expected.

Thanks, I've now installed the patch on the emacs-27 branch, and I'm
marking this bug done.  Feel free to reopen if there are more problems
related to this.

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From: Aidan Beggs <nadiasggeb001 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.3;
 global-display-line-numbers-mode and flymake-show-diagnostics-buffer
 error
Date: Thu, 9 Apr 2020 16:55:44 -0400

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I'm running into errors when attempting to run
flymake-show-diagnostics-buffer. If run after I've enabled line numbers via
global-display-line-numbers-mode, I get the following stack trace:

Debugger entered--Lisp error: (wrong-type-argument stringp nil)
  flymake--diagnostics-buffer-entries()
  tabulated-list-print(t)
  tabulated-list-revert()
  run-hooks(display-line-numbers-mode-hook
display-line-numbers-mode-on-hook)
  display-line-numbers-mode()
  display-line-numbers--turn-on()
  global-display-line-numbers-mode-enable-in-buffers()
  run-hooks(after-change-major-mode-hook)
  run-mode-hooks(flymake-diagnostics-buffer-mode-hook)
  flymake-diagnostics-buffer-mode()
  flymake-show-diagnostics-buffer()
  funcall-interactively(flymake-show-diagnostics-buffer)
  call-interactively(flymake-show-diagnostics-buffer record nil)
  command-execute(flymake-show-diagnostics-buffer record)
  execute-extended-command(nil "flymake-show-diagnostics-buffer"
"flymake-show-diagnostics")
  funcall-interactively(execute-extended-command nil
"flymake-show-diagnostics-buffer" "flymake-show-diagnostics")
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)

Once this has been thrown once, running flymake-show-diagnostics-buffer
works properly. The only thing in my config file is
(global-display-line-numbers-mode).

To repro:

emacs -Q
C-x b *scratch*
M-x global-display-line-numbers-mode
M-x flymake-mode
M-x flymake-show-diagnostics-buffer

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Flymake mode enabled in current buffer
tabulated-list-print: Wrong type argument: stringp, nil
Making completion list...

Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-modules
 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fno-plt'
 CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS GLIB
NOTIFY ACL GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD LCMS2

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  flymake-mode: t
  global-display-line-numbers-mode: t
  display-line-numbers-mode: t
  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

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