bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Aaron Jensen]

Unfortunately, the repro isn't clear, but after using Emacs for some
time, the left side of the hollow box point will end up being slightly
thicker than the right side. After this happens, when the point is
moved, it will leave a faint line on the left side of the point.
Restarting emacs will cause the point to be a uniform box.

Note that I only use the hollow box when a window is not active. Also, I
have a hidpi display, so could it possibly be some sort of rounding
error somewhere?


In GNU Emacs 27.0.91 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.20)
 of 2020-07-05 built on pop-os
Repository revision: 247dcb4b1b1b4ea3d50b63d41c4efa58743f610d
Repository branch: emacs-27
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Pop!_OS 20.04 LTS

Recent messages:
config •    1ms • Emacs Lisp
config •    5ms • Clean shutdown
config •    7ms • Enable Default Theme
→★ loaded init.el in   93 ms
Explain-pause-mode enabled.
LSP :: ruby-ls:1891877 initialized successfully
Quit
Waiting for git... [2 times]
Appointment reminders enabled (no diary file found)
Added 5 events for today

Configured using:
 'configure --with-json'

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

Important settings:
  value of $LC_MONETARY: en_US.UTF-8
  value of $LC_NUMERIC: en_US.UTF-8
  value of $LC_TIME: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: EnhRuby

Minor modes in effect:
  global-magit-file-mode: t
  magit-file-mode: t
  global-git-commit-mode: t
  async-bytecomp-package-mode: t
  eval-sexp-fu-flash-mode: t
  lsp-ui-mode: t
  lsp-ui-sideline-mode: t
  global-flycheck-mode: t
  flycheck-mode: t
  company-posframe-mode: t
  company-prescient-mode: t
  company-mode: t
  lsp-managed-mode: t
  lsp-mode: t
  evil-ruby-text-objects-mode: t
  rspec-verifiable-mode: t
  ruby-refactor-mode: t
  yas-global-mode: t
  yas-minor-mode: t
  winner-mode: t
  dtrt-indent-mode: t
  global-auto-revert-mode: t
  ivy-rich-mode: t
  ivy-prescient-mode: t
  counsel-mode: t
  ivy-posframe-mode: t
  ivy-mode: t
  persp-mode: t
  projectile-mode: t
  better-jumper-mode: t
  better-jumper-local-mode: t
  show-smartparens-global-mode: t
  show-smartparens-mode: t
  smartparens-global-mode: t
  smartparens-mode: t
  evil-traces-mode: t
  global-evil-collection-unimpaired-mode: t
  evil-collection-unimpaired-mode: t
  global-evil-mc-mode: t
  evil-mc-mode: t
  global-evil-matchit-mode: t
  evil-matchit-mode: t
  global-evil-surround-mode: t
  evil-surround-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  evil-mode: t
  evil-local-mode: t
  doom-modeline-mode: t
  recentf-mode: t
  org-roam-mode: t
  shell-dirtrack-mode: t
  explain-pause-mode: t
  gcmh-mode: t
  which-key-mode: t
  prescient-persist-mode: t
  +popup-mode: t
  ws-butler-global-mode: t
  ws-butler-mode: t
  save-place-mode: t
  leader-key-leader-override-mode: t
  global-leader-key-leader-override-mode: t
  delete-selection-mode: t
  savehist-mode: t
  xterm-mouse-mode: t
  override-global-mode: t
  straight-use-package-mode: t
  straight-package-neutering-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  window-divider-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  auto-fill-function: yas--auto-fill
  transient-mark-mode: t
  abbrev-mode: t

Load-path shadows:
/home/aaronjensen/.emacs.d/straight/build/lispy/elpa hides
/home/aaronjensen/.emacs.d/straight/build/ivy/elpa
/home/aaronjensen/.emacs.d/straight/build/org/ob-hledger hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-hledger
/home/aaronjensen/.emacs.d/straight/build/org/ob-octave hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-octave
/home/aaronjensen/.emacs.d/straight/build/org/ob-exp hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-exp
/home/aaronjensen/.emacs.d/straight/build/org/ob-sqlite hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-sqlite
/home/aaronjensen/.emacs.d/straight/build/org/ob-ditaa hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-ditaa
/home/aaronjensen/.emacs.d/straight/build/org/ol-bbdb hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-bbdb
/home/aaronjensen/.emacs.d/straight/build/org/org-capture hides
/usr/local/share/emacs/27.0.91/lisp/org/org-capture
/home/aaronjensen/.emacs.d/straight/build/org/ol-info hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-info
/home/aaronjensen/.emacs.d/straight/build/org/ob-ocaml hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-ocaml
/home/aaronjensen/.emacs.d/straight/build/org/ol hides
/usr/local/share/emacs/27.0.91/lisp/org/ol
/home/aaronjensen/.emacs.d/straight/build/org/ob-ebnf hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-ebnf
/home/aaronjensen/.emacs.d/straight/build/org/org-element hides
/usr/local/share/emacs/27.0.91/lisp/org/org-element
/home/aaronjensen/.emacs.d/straight/build/org/ob-matlab hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-matlab
/home/aaronjensen/.emacs.d/straight/build/org/org-lint hides
/usr/local/share/emacs/27.0.91/lisp/org/org-lint
/home/aaronjensen/.emacs.d/straight/build/org/ox-md hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-md
/home/aaronjensen/.emacs.d/straight/build/org/ob-C hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-C
/home/aaronjensen/.emacs.d/straight/build/org/ob-screen hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-screen
/home/aaronjensen/.emacs.d/straight/build/org/ob-sed hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-sed
/home/aaronjensen/.emacs.d/straight/build/org/org-ctags hides
/usr/local/share/emacs/27.0.91/lisp/org/org-ctags
/home/aaronjensen/.emacs.d/straight/build/org/ob-calc hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-calc
/home/aaronjensen/.emacs.d/straight/build/org/ob-shen hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-shen
/home/aaronjensen/.emacs.d/straight/build/org/org-macro hides
/usr/local/share/emacs/27.0.91/lisp/org/org-macro
/home/aaronjensen/.emacs.d/straight/build/org/ob-fortran hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-fortran
/home/aaronjensen/.emacs.d/straight/build/org/ob-latex hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-latex
/home/aaronjensen/.emacs.d/straight/build/org/ol-eww hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-eww
/home/aaronjensen/.emacs.d/straight/build/org/ob-maxima hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-maxima
/home/aaronjensen/.emacs.d/straight/build/org/ob-tangle hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-tangle
/home/aaronjensen/.emacs.d/straight/build/org/ol-eshell hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-eshell
/home/aaronjensen/.emacs.d/straight/build/org/ob-coq hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-coq
/home/aaronjensen/.emacs.d/straight/build/org/ob-ruby hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-ruby
/home/aaronjensen/.emacs.d/straight/build/org/ob-stan hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-stan
/home/aaronjensen/.emacs.d/straight/build/org/ob-comint hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-comint
/home/aaronjensen/.emacs.d/straight/build/org/ob-sql hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-sql
/home/aaronjensen/.emacs.d/straight/build/org/ob-shell hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-shell
/home/aaronjensen/.emacs.d/straight/build/org/org-keys hides
/usr/local/share/emacs/27.0.91/lisp/org/org-keys
/home/aaronjensen/.emacs.d/straight/build/org/ox-beamer hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-beamer
/home/aaronjensen/.emacs.d/straight/build/org/ob-R hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-R
/home/aaronjensen/.emacs.d/straight/build/org/ox hides
/usr/local/share/emacs/27.0.91/lisp/org/ox
/home/aaronjensen/.emacs.d/straight/build/org/ob-ref hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-ref
/home/aaronjensen/.emacs.d/straight/build/org/ob-abc hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-abc
/home/aaronjensen/.emacs.d/straight/build/org/ox-icalendar hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-icalendar
/home/aaronjensen/.emacs.d/straight/build/org/ox-odt hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-odt
/home/aaronjensen/.emacs.d/straight/build/org/ob-org hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-org
/home/aaronjensen/.emacs.d/straight/build/org/org-crypt hides
/usr/local/share/emacs/27.0.91/lisp/org/org-crypt
/home/aaronjensen/.emacs.d/straight/build/org/ob-forth hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-forth
/home/aaronjensen/.emacs.d/straight/build/org/org-mouse hides
/usr/local/share/emacs/27.0.91/lisp/org/org-mouse
/home/aaronjensen/.emacs.d/straight/build/org/org-compat hides
/usr/local/share/emacs/27.0.91/lisp/org/org-compat
/home/aaronjensen/.emacs.d/straight/build/org/ob-core hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-core
/home/aaronjensen/.emacs.d/straight/build/org/org-mobile hides
/usr/local/share/emacs/27.0.91/lisp/org/org-mobile
/home/aaronjensen/.emacs.d/straight/build/org/ol-gnus hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-gnus
/home/aaronjensen/.emacs.d/straight/build/org/ob-gnuplot hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-gnuplot
/home/aaronjensen/.emacs.d/straight/build/org/ob-lilypond hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-lilypond
/home/aaronjensen/.emacs.d/straight/build/org/org hides
/usr/local/share/emacs/27.0.91/lisp/org/org
/home/aaronjensen/.emacs.d/straight/build/org/ob-scheme hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-scheme
/home/aaronjensen/.emacs.d/straight/build/org/ob-picolisp hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-picolisp
/home/aaronjensen/.emacs.d/straight/build/org/org-macs hides
/usr/local/share/emacs/27.0.91/lisp/org/org-macs
/home/aaronjensen/.emacs.d/straight/build/org/ob-sass hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-sass
/home/aaronjensen/.emacs.d/straight/build/org/org-goto hides
/usr/local/share/emacs/27.0.91/lisp/org/org-goto
/home/aaronjensen/.emacs.d/straight/build/org/org-colview hides
/usr/local/share/emacs/27.0.91/lisp/org/org-colview
/home/aaronjensen/.emacs.d/straight/build/org/ox-html hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-html
/home/aaronjensen/.emacs.d/straight/build/org/org-attach hides
/usr/local/share/emacs/27.0.91/lisp/org/org-attach
/home/aaronjensen/.emacs.d/straight/build/org/ox-ascii hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-ascii
/home/aaronjensen/.emacs.d/straight/build/org/ob-dot hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-dot
/home/aaronjensen/.emacs.d/straight/build/org/org-feed hides
/usr/local/share/emacs/27.0.91/lisp/org/org-feed
/home/aaronjensen/.emacs.d/straight/build/org/ob-ledger hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-ledger
/home/aaronjensen/.emacs.d/straight/build/org/ob-lob hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-lob
/home/aaronjensen/.emacs.d/straight/build/org/org-src hides
/usr/local/share/emacs/27.0.91/lisp/org/org-src
/home/aaronjensen/.emacs.d/straight/build/org/ol-rmail hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-rmail
/home/aaronjensen/.emacs.d/straight/build/org/org-pcomplete hides
/usr/local/share/emacs/27.0.91/lisp/org/org-pcomplete
/home/aaronjensen/.emacs.d/straight/build/org/ob-awk hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-awk
/home/aaronjensen/.emacs.d/straight/build/org/ob-vala hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-vala
/home/aaronjensen/.emacs.d/straight/build/org/ob-lisp hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-lisp
/home/aaronjensen/.emacs.d/straight/build/org/org-install hides
/usr/local/share/emacs/27.0.91/lisp/org/org-install
/home/aaronjensen/.emacs.d/straight/build/org/ox-publish hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-publish
/home/aaronjensen/.emacs.d/straight/build/org/ob-python hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-python
/home/aaronjensen/.emacs.d/straight/build/org/ob-table hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-table
/home/aaronjensen/.emacs.d/straight/build/org/ob-emacs-lisp hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-emacs-lisp
/home/aaronjensen/.emacs.d/straight/build/org/org-footnote hides
/usr/local/share/emacs/27.0.91/lisp/org/org-footnote
/home/aaronjensen/.emacs.d/straight/build/org/org-habit hides
/usr/local/share/emacs/27.0.91/lisp/org/org-habit
/home/aaronjensen/.emacs.d/straight/build/org/ol-w3m hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-w3m
/home/aaronjensen/.emacs.d/straight/build/org/org-entities hides
/usr/local/share/emacs/27.0.91/lisp/org/org-entities
/home/aaronjensen/.emacs.d/straight/build/org/org-id hides
/usr/local/share/emacs/27.0.91/lisp/org/org-id
/home/aaronjensen/.emacs.d/straight/build/org/org-tempo hides
/usr/local/share/emacs/27.0.91/lisp/org/org-tempo
/home/aaronjensen/.emacs.d/straight/build/org/org-clock hides
/usr/local/share/emacs/27.0.91/lisp/org/org-clock
/home/aaronjensen/.emacs.d/straight/build/org/ob-perl hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-perl
/home/aaronjensen/.emacs.d/straight/build/org/org-list hides
/usr/local/share/emacs/27.0.91/lisp/org/org-list
/home/aaronjensen/.emacs.d/straight/build/org/org-plot hides
/usr/local/share/emacs/27.0.91/lisp/org/org-plot
/home/aaronjensen/.emacs.d/straight/build/org/org-num hides
/usr/local/share/emacs/27.0.91/lisp/org/org-num
/home/aaronjensen/.emacs.d/straight/build/org/ob-plantuml hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-plantuml
/home/aaronjensen/.emacs.d/straight/build/org/org-table hides
/usr/local/share/emacs/27.0.91/lisp/org/org-table
/home/aaronjensen/.emacs.d/straight/build/org/ob-haskell hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-haskell
/home/aaronjensen/.emacs.d/straight/build/org/ox-org hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-org
/home/aaronjensen/.emacs.d/straight/build/org/ob-js hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-js
/home/aaronjensen/.emacs.d/straight/build/org/ox-texinfo hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-texinfo
/home/aaronjensen/.emacs.d/straight/build/org/org-attach-git hides
/usr/local/share/emacs/27.0.91/lisp/org/org-attach-git
/home/aaronjensen/.emacs.d/straight/build/org/ob-J hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-J
/home/aaronjensen/.emacs.d/straight/build/org/ob-css hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-css
/home/aaronjensen/.emacs.d/straight/build/org/org-protocol hides
/usr/local/share/emacs/27.0.91/lisp/org/org-protocol
/home/aaronjensen/.emacs.d/straight/build/org/ob-io hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-io
/home/aaronjensen/.emacs.d/straight/build/org/ob-processing hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-processing
/home/aaronjensen/.emacs.d/straight/build/org/ob-makefile hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-makefile
/home/aaronjensen/.emacs.d/straight/build/org/ob-asymptote hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-asymptote
/home/aaronjensen/.emacs.d/straight/build/org/ob-mscgen hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-mscgen
/home/aaronjensen/.emacs.d/straight/build/org/ol-bibtex hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-bibtex
/home/aaronjensen/.emacs.d/straight/build/org/org-datetree hides
/usr/local/share/emacs/27.0.91/lisp/org/org-datetree
/home/aaronjensen/.emacs.d/straight/build/org/org-agenda hides
/usr/local/share/emacs/27.0.91/lisp/org/org-agenda
/home/aaronjensen/.emacs.d/straight/build/org/ox-man hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-man
/home/aaronjensen/.emacs.d/straight/build/org/org-indent hides
/usr/local/share/emacs/27.0.91/lisp/org/org-indent
/home/aaronjensen/.emacs.d/straight/build/org/ob-groovy hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-groovy
/home/aaronjensen/.emacs.d/straight/build/org/ob-lua hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-lua
/home/aaronjensen/.emacs.d/straight/build/org/org-inlinetask hides
/usr/local/share/emacs/27.0.91/lisp/org/org-inlinetask
/home/aaronjensen/.emacs.d/straight/build/org/ob hides
/usr/local/share/emacs/27.0.91/lisp/org/ob
/home/aaronjensen/.emacs.d/straight/build/org/org-timer hides
/usr/local/share/emacs/27.0.91/lisp/org/org-timer
/home/aaronjensen/.emacs.d/straight/build/org/ox-latex hides
/usr/local/share/emacs/27.0.91/lisp/org/ox-latex
/home/aaronjensen/.emacs.d/straight/build/org/org-loaddefs hides
/usr/local/share/emacs/27.0.91/lisp/org/org-loaddefs
/home/aaronjensen/.emacs.d/straight/build/org/org-duration hides
/usr/local/share/emacs/27.0.91/lisp/org/org-duration
/home/aaronjensen/.emacs.d/straight/build/org/ob-clojure hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-clojure
/home/aaronjensen/.emacs.d/straight/build/org/org-faces hides
/usr/local/share/emacs/27.0.91/lisp/org/org-faces
/home/aaronjensen/.emacs.d/straight/build/org/ol-mhe hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-mhe
/home/aaronjensen/.emacs.d/straight/build/org/ob-java hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-java
/home/aaronjensen/.emacs.d/straight/build/org/ol-docview hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-docview
/home/aaronjensen/.emacs.d/straight/build/org/ob-eval hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-eval
/home/aaronjensen/.emacs.d/straight/build/org/ob-eshell hides
/usr/local/share/emacs/27.0.91/lisp/org/ob-eshell
/home/aaronjensen/.emacs.d/straight/build/org/ol-irc hides
/usr/local/share/emacs/27.0.91/lisp/org/ol-irc
/home/aaronjensen/.emacs.d/straight/build/org/org-archive hides
/usr/local/share/emacs/27.0.91/lisp/org/org-archive
/home/aaronjensen/.emacs.d/straight/build/let-alist/let-alist hides
/usr/local/share/emacs/27.0.91/lisp/emacs-lisp/let-alist

Features:
(shadow sort mail-extr emacsbug sendmail appt diary-lib diary-loaddefs
org-duration ol-eww ol-rmail ol-mhe ol-irc ol-info ol-gnus nnir gnus-sum
gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail mail-source
utf7 netrc nnoo gnus-spec gnus-int gnus-range gnus-win ol-docview
doc-view jka-compr image-mode exif ol-bibtex bibtex ol-bbdb ol-w3m ffap
tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat
parse-time iso8601 ls-lisp magit-bookmark bookmark bug-reference
mule-util wgrep sql json-mode json-reformat json-snatcher
smartparens-javascript js smartparens-c cc-mode cc-fonts cc-guess
cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs
smartparens-lua lua-mode sh-script vc-mtn vc-hg org-agenda executable
restart-emacs desktop frameset evil-magit magit-submodule magit-obsolete
magit-blame magit-stash magit-reflog magit-bisect magit-push magit-pull
magit-fetch magit-clone magit-remote magit-commit magit-sequence
magit-notes magit-worktree magit-tag magit-merge magit-branch
magit-reset magit-files magit-refs magit-status magit package
url-handlers magit-repos magit-apply magit-wip magit-log which-func
magit-diff smerge-mode vc-git diff-mode magit-core magit-autorevert
magit-margin magit-transient magit-process magit-mode git-commit
transient magit-git magit-section magit-utils crm log-edit message
rfc822 mml mml-sec epa epg epg-config mm-decode mm-bodies mm-encode
mailabbrev gmm-utils mailheader pcvs-util add-log with-editor
async-bytecomp company-lsp eval-sexp-fu eros lispyville lispy hydra
lispy-inline avy lispy-tags mode-local elisp-def ert pp
evil-collection-debug debug sotlisp skeleton org-eldoc orgonomic
form-feed eww shr svg mm-url gnus nnheader gnus-util rmail
rmail-loaddefs text-property-search mail-utils url-queue browse-url
vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs vc vc-dispatcher
company-oddmuse company-keywords company-etags etags fileloop
company-gtags company-dabbrev-code company-dabbrev company-files
company-capf company-cmake company-xcode company-clang company-semantic
company-eclim company-template company-bbdb lsp-ui lsp-ui-flycheck
lsp-ui-doc goto-addr lsp-ui-imenu lsp-ui-peek lsp-ui-sideline flycheck
company-posframe company-prescient company-tng company view lsp-sqls
lsp-yaml lsp-xml lsp-vhdl lsp-vetur lsp-html lsp-verilog lsp-terraform
lsp-solargraph lsp-serenata lsp-rust lsp-pyls lsp-pwsh lsp-perl lsp-json
lsp-intelephense lsp-haxe lsp-go lsp-gdscript lsp-fsharp lsp-eslint
lsp-erlang lsp-elm lsp-css lsp-csharp gnutls lsp-clojure lsp-clients
lsp-mode lv lsp-protocol spinner network-stream smartparens-markdown
markdown-mode ht ewoc em-glob esh-util bindat evil-ruby-text-objects
rspec-mode ruby-refactor ruby-mode smie smartparens-ruby enh-ruby-mode
paren hide-mode-line popup-mode-core yasnippet popup-mode-hacks winner
dtrt-indent evil-nerd-commenter evil-nerd-commenter-operator
evil-nerd-commenter-sdk smartparens-html sgml-mode dom evil-visualstar
autorevert filenotify ivy-rich ivy-prescient counsel-projectile counsel
xdg evil-collection-xref xref project swiper ivy-posframe posframe ivy
ivy-faces ivy-overlay colir color persp-projectile perspective ido
projectile grep compile ibuf-ext better-jumper smartparens-config
smartparens-org smartparens-text smartparens evil-collection-ibuffer
evil-traces evil-org-agenda evil-org evil-anzu anzu
evil-collection-unimpaired evil-collection-which-key
evil-collection-profiler evil-collection-helpful evil-collection-help
evil-collection-dired evil-collection-edebug evil-collection-custom
cus-edit cus-start cus-load evil-collection-process-menu evil-collection
annalist evil-mc evil-mc-command-execute evil-mc-command-record
evil-mc-cursor-make evil-mc-region evil-mc-cursor-state evil-mc-undo
evil-mc-vars evil-mc-known-commands evil-mc-common evil-matchit
evil-matchit-sdk evil-surround evil evil-integration undo-tree diff
evil-maps evil-commands reveal flyspell ispell evil-jumps
evil-command-window evil-types evil-search evil-ex evil-macros
evil-repeat evil-states evil-core evil-common windmove rect
evil-digraphs evil-vars ibuffer ibuffer-loaddefs thingatpt
modus-vivendi-theme helpful imenu trace edebug backtrace info-look
dash-functional help-fns radix-tree elisp-refs loop dired-subtree
dired-hacks-utils dired dired-loaddefs face-remap doom-modeline
doom-modeline-segments doom-modeline-env doom-modeline-core shrink-path
all-the-icons all-the-icons-faces data-material data-weathericons
data-octicons data-fileicons data-faicons data-alltheicons memoize
recentf tree-widget wid-edit org-roam org-roam-graph org-roam-doctor
org-roam-db emacsql-sqlite3 emacsql emacsql-compiler org-roam-dailies
org-roam-capture org-roam-completion org-roam-buffer inline pcase
org-roam-macs org-roam-compat f s dash org-element avl-tree generator
org-download org-attach org-id url-http url url-proxy url-privacy
url-expand url-methods url-history mailcap url-auth mail-parse rfc2231
rfc2047 rfc2045 mm-util ietf-drums mail-prsvr url-cookie url-domsuf
url-util url-gw nsm rmc puny url-parse auth-source eieio eieio-core
eieio-loaddefs password-cache json map url-vars async org-protocol
org-capture org-refile org-tempo tempo org-mac-link rx ob-shell shell
org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-footnote
org-src ob-comint org-pcomplete pcomplete comint ansi-color ring
org-list org-faces org-entities time-date noutline outline ob-emacs-lisp
ob-core ob-eval org-table ol org-keys org-compat org-macs org-loaddefs
format-spec find-func cal-menu calendar cal-loaddefs explain-pause-mode
explain-pause-top explain-pause-log-to-socket profiler gcmh server
modus-operandi-theme dbus xml gcmh-autoloads
explain-pause-mode-autoloads restclient-autoloads vterm-toggle-autoloads
vterm-autoloads dumb-jump-autoloads popup-autoloads
dockerfile-mode-autoloads yaml-mode-autoloads json-snatcher-autoloads
json-reformat-autoloads lua-mode-autoloads ruby-refactor-autoloads
rspec-mode-autoloads rufo-autoloads evil-ruby-text-objects-autoloads
enh-ruby-mode-autoloads sotlisp-autoloads elisp-def-autoloads
lispyville-autoloads lispy-autoloads zoutline-autoloads iedit-autoloads
eros-autoloads eval-sexp-fu-autoloads eslintd-fix-autoloads
web-mode-autoloads company-lsp-autoloads company-posframe-autoloads
company-prescient-autoloads company-autoloads evil-magit-autoloads
magit-autoloads git-commit-autoloads with-editor-autoloads
transient-autoloads flycheck-autoloads let-alist-autoloads
lsp-ui-autoloads lsp-mode-autoloads markdown-mode-autoloads
spinner-autoloads ht-autoloads gnuplot-autoloads org-download-autoloads
async-autoloads org-journal-autoloads org-gcal-autoloads alert-autoloads
log4e-autoloads gntp-autoloads request-deferred-autoloads
deferred-autoloads request-autoloads deft-autoloads org-roam-autoloads
emacsql-sqlite3-autoloads emacsql-autoloads orgonomic-autoloads
org-drill-autoloads persist-autoloads evil-org-autoloads
restart-emacs-autoloads better-jumper-autoloads which-key advice
ace-window-autoloads buffer-move-autoloads ivy-rich-autoloads
ivy-xref-autoloads wgrep-autoloads ivy-posframe-autoloads
posframe-autoloads ivy-prescient-autoloads persp-projectile-autoloads
perspective-autoloads prescient prescient-autoloads which-key-autoloads
popup-mode popup-mode-settings popup-mode-autoloads
hide-mode-line-autoloads avy-autoloads yasnippet-autoloads
form-feed-autoloads drag-stuff-autoloads smartparens-autoloads
dtrt-indent-autoloads ws-butler ws-butler-autoloads evil-anzu-autoloads
anzu-autoloads evil-collection-autoloads annalist-autoloads
evil-mc-autoloads evil-matchit-autoloads evil-traces-autoloads
evil-nerd-commenter-autoloads evil-visualstar-autoloads
evil-surround-autoloads evil-autoloads goto-chg-autoloads
undo-tree-autoloads counsel-projectile-autoloads counsel-autoloads
swiper-autoloads ivy-autoloads projectile-autoloads pkg-info-autoloads
epl-autoloads saveplace doom-modeline-autoloads shrink-path-autoloads
all-the-icons-autoloads memoize-autoloads modus-operandi-theme-autoloads
modus-vivendi-theme-autoloads compdef derived compdef-autoloads
helpful-autoloads elisp-refs-autoloads loop-autoloads f-autoloads
s-autoloads dash-functional-autoloads dired-subtree-autoloads
dired-hacks-utils-autoloads dash-autoloads hydra-autoloads lv-autoloads
edmacro kmacro bind-map leader-key leader-key-autoloads
bind-map-autoloads delsel savehist xt-mouse no-littering
no-littering-autoloads finder-inf bind-key easy-mmode org-autoloads
org-version el-patch-autoloads cl-seq use-package-autoloads
bind-key-autoloads straight-autoloads info cl-extra help-mode easymenu
seq byte-opt straight subr-x cl-macs gv bytecomp byte-compile cconv
cl-loaddefs cl-lib 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 lcms2 dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 709518 827723)
 (symbols 48 63320 464)
 (strings 32 214735 107138)
 (string-bytes 1 7450854)
 (vectors 16 119221)
 (vector-slots 8 2327211 954848)
 (floats 8 1620 4237)
 (intervals 56 2755 1746)
 (buffers 1000 26))

Aaron

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Aaron Jensen]

I'm going to try using --with-cairo for a bit to see if that helps.

Aaron

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Aaron Jensen]

[-- Attachment #1: Type: text/plain, Size: 197 bytes --]

Forgot to attach a screenshot.

Aaron

On Mon, Jul 20, 2020 at 6:41 PM Aaron Jensen <aaronjensen@gmail.com> wrote:
>
> I'm going to try using --with-cairo for a bit to see if that helps.
>
> Aaron

[-- Attachment #2: Screenshot from 2020-07-20 18-28-30.png --]
[-- Type: image/png, Size: 52984 bytes --]

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Eli Zaretskii]

> From: Aaron Jensen <aaronjensen@gmail.com>
> Date: Mon, 20 Jul 2020 18:36:23 -0700
> 
> Unfortunately, the repro isn't clear, but after using Emacs for some
> time, the left side of the hollow box point will end up being slightly
> thicker than the right side. After this happens, when the point is
> moved, it will leave a faint line on the left side of the point.
> Restarting emacs will cause the point to be a uniform box.

I've scanned the X implementation of the hollow box, and couldn't find
where it does something that depends on HiDPI.  Can you spot anything
like that?

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Radon Rosborough]

[-- Attachment #1: Type: text/plain, Size: 2467 bytes --]

I've been affected by this issue for some years, only on Linux to my
recollection, across multiple Emacs versions (26, 27, 28), and with
the same behavior described by Aaron.

After some time using Emacs---the trigger is unclear---Emacs enters a
state where the hollow box cursor is drawn incorrectly. Specifically,
the lines of the hollow box cursor are drawn with a thickness of 2
pixels rather than 1 pixel. To make things a bit more confusing, only
the bottom, left, and right lines of the hollow box experience this. I
believe this is because the rectangle drawing is clipped to the
current glyph row (though not the current glyph column), so the extra
pixels on the top fall outside the clip region and get dropped.

Here are screenshots showing the behavior at a pixel level, for
comparison: https://imgur.com/a/L84ekeS

The relevant code is in the function x_draw_hollow_cursor, here:
https://github.com/emacs-mirror/emacs/blob/96dd0196c28bc36779584e47fffcca433c9309cd/src/xterm.c#L9234

By compiling Emacs with debugging symbols and stepping through
x_draw_hollow_cursor with GDB, I verified that all the arguments
passed to XDrawRectangle (via x_draw_rectangle) are identical between
an instance of Emacs exhibiting the bug and one that is fine.

I've attached a patch that appears to resolve the problem for me.

What we are doing in this patch is overriding the graphics context
configuration so that line_width is set to 1, rather than the default
of 0. There is somewhat detailed documentation from xlib on the
meaning of the line_width argument, and how to set it via XChangeGC,
here: https://tronche.com/gui/x/xlib/GC/manipulating.html

In short, a line_width of 0 means "draw a line of width 1 pixel, but
use a device-dependent algorithm to do so, which may have higher
performance". Unlike setting line_width to 1, setting it to 0 does not
make any guarantees about the exact pixels that are rendered as part
of the line. Apparently, there is a bug in the X server's
device-dependent graphics code, or perhaps the graphics driver, which
causes the "device-dependent algorithm" to be buggy under some
circumstances, and draw a line of width 2 when a line of width 1 is
requested.

Other interesting behavior: If I set line_width explicitly to 2 rather
than to 1, then the graphical artifacts mentioned in the initial bug
report occur unconditionally, every time a hollow box cursor is
rendered.

Would this change be appropriate to include in Emacs?

[-- Attachment #2: line_width.patch --]
[-- Type: application/x-patch, Size: 874 bytes --]

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Eli Zaretskii]

> From: Radon Rosborough <radon.neon@gmail.com>
> Date: Sun, 28 Mar 2021 15:21:47 -0700
> 
> I've attached a patch that appears to resolve the problem for me.
> 
> What we are doing in this patch is overriding the graphics context
> configuration so that line_width is set to 1, rather than the default
> of 0. There is somewhat detailed documentation from xlib on the
> meaning of the line_width argument, and how to set it via XChangeGC,
> here: https://tronche.com/gui/x/xlib/GC/manipulating.html
> 
> In short, a line_width of 0 means "draw a line of width 1 pixel, but
> use a device-dependent algorithm to do so, which may have higher
> performance". Unlike setting line_width to 1, setting it to 0 does not
> make any guarantees about the exact pixels that are rendered as part
> of the line. Apparently, there is a bug in the X server's
> device-dependent graphics code, or perhaps the graphics driver, which
> causes the "device-dependent algorithm" to be buggy under some
> circumstances, and draw a line of width 2 when a line of width 1 is
> requested.

Since this happens for unknown reasons, most probably some misfeature
of the X server, the change to use an explicit line thickness is a
debugging device.  As such, it shouldn't be the default; instead,
let's have a Lisp variable that gives the thickness, by default zero,
and let users affected by this issue set the variable to whatever
value that fixes the problem.

> Other interesting behavior: If I set line_width explicitly to 2 rather
> than to 1, then the graphical artifacts mentioned in the initial bug
> report occur unconditionally, every time a hollow box cursor is
> rendered.

I cannot see anything when I go to the URL you posted, just a blank
screen (a frequent problem with imgur.com), so I don't think I
understand what "artifacts" are you alluding to.  Does Emacs leave
traces of the hollow cursor when it moves it to another location?  Or
are you alluding to the different thickness of some of the borders of
the cursor?

Thanks.

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Radon Rosborough]

[-- Attachment #1.1: Type: text/plain, Size: 107 bytes --]

The Imgur images look fine to me, but I've attached them to this email
additionally, for your convenience.

[-- Attachment #1.2: Type: text/html, Size: 149 bytes --]

[-- Attachment #2: screenshot1.png --]
[-- Type: image/png, Size: 2518 bytes --]

[-- Attachment #3: screenshot2.png --]
[-- Type: image/png, Size: 3512 bytes --]

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> Since this happens for unknown reasons, most probably some misfeature
> of the X server, the change to use an explicit line thickness is a
> debugging device.  As such, it shouldn't be the default; instead,
> let's have a Lisp variable that gives the thickness, by default zero,
> and let users affected by this issue set the variable to whatever
> value that fixes the problem.

The patch fixes an issue under some X implementations, and doesn't seem
to have any negative effects (that I can see), so I've applied Rodon's
patch.

Allowing users to control the width of the lines sounds like a nice
feature, but I don't think anybody's requested it, so I'm not sure
holding up fixing this bug warrants waiting for that to be implemented.

It's easy enough to implement in xterm.c, but (for instance) the Windows
implementation uses FrameRect, which doesn't allow specifying the line
thickness?  I'd rather not have a feature divergence here.

So I'm closing this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Radon Rosborough <radon.neon@gmail.com>,  42452@debbugs.gnu.org
> Date: Thu, 13 May 2021 11:44:23 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Since this happens for unknown reasons, most probably some misfeature
> > of the X server, the change to use an explicit line thickness is a
> > debugging device.  As such, it shouldn't be the default; instead,
> > let's have a Lisp variable that gives the thickness, by default zero,
> > and let users affected by this issue set the variable to whatever
> > value that fixes the problem.
> 
> The patch fixes an issue under some X implementations, and doesn't seem
> to have any negative effects (that I can see), so I've applied Rodon's
> patch.
> 
> Allowing users to control the width of the lines sounds like a nice
> feature, but I don't think anybody's requested it, so I'm not sure
> holding up fixing this bug warrants waiting for that to be implemented.
> 
> It's easy enough to implement in xterm.c, but (for instance) the Windows
> implementation uses FrameRect, which doesn't allow specifying the line
> thickness?  I'd rather not have a feature divergence here.

The problem is only on X, so the variable should be X-specific.  It is
not unheard of to have such debugging-related variables be
system-specific.

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> The problem is only on X, so the variable should be X-specific.  It is
> not unheard of to have such debugging-related variables be
> system-specific.

That's true -- and if it was purely a work-around, then I'd see no
problems with adding the variable.  But in this case, we're talking
about allowing customising the line width of the hollow cursor, which
sounds like something that people might find useful in general.

And I'd really prefer to have that work consistently across all
(significant) platforms.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#42452: 27.0.91; hollow box cursor sometimes leaves artifacts

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: radon.neon@gmail.com,  42452@debbugs.gnu.org
> Date: Sun, 16 May 2021 15:23:14 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > The problem is only on X, so the variable should be X-specific.  It is
> > not unheard of to have such debugging-related variables be
> > system-specific.
> 
> That's true -- and if it was purely a work-around, then I'd see no
> problems with adding the variable.  But in this case, we're talking
> about allowing customising the line width of the hollow cursor, which
> sounds like something that people might find useful in general.

No, we are talking about code that no one really understands why it's
needed, and why only on some systems.  Which means we also don't
understand whether it could have some adverse effects on some systems.