GNU bug report logs - #49622
27.2; A new MacOS display heisenbug

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

From: Devon Sean McCullough <Devon2020 <at> jovi.net>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.2; A new MacOS display heisenbug
Date: Sun, 18 Jul 2021 09:10:11 -0400

Glyph out of place, vertically shifted downwards:

Type ;; foo ⟡ bar
where a box ^ displays in place of the WHITE CONCAVE-SIDED DIAMOND
which can by typed by C-x 8 RET white concave-sided diamond RET
but renders as a box instead.

When I start Emacs, with or without init files,
the box is rendered in the correct screen position.

After editing for a while, the box renders on the line below.

		Peace
			--Devon

P.S.  Please find screen shots at http://jovi.net/Emacs-Bug/Render

Any debugging suggestions?

I'm mailing this bug report from a fresh "CLEAN" emacs,
not the long-running bug-manifesting "DIRTY" emacs.

DIRTY Emacs has these additional features: (mode-local php-mode
conf-mode mule-diag filecache korea-util whitespace htmlfontify
htmlfontify-loaddefs lpr reposition gnutls url-http url-gw url-cache
url-auth warnings follow tramp-cache tramp-sh tramp tramp-loaddefs
trampver tramp-integration files-x tramp-compat edebug descr-text
hanja-util picture rng-xsd xsd-regexp rng-cmpct rng-nxml rng-valid
rng-loc rng-uri rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn
nxml-ns nxml-mode nxml-outln nxml-rap nxml-util nxml-enc xmltok novice
erc-truncate erc-speedbar erc-sound erc-services erc-replace erc-page
erc-notify erc-log erc-identd erc-ibuffer erc-ezbounce
erc-desktop-notifications notifications dbus erc-dcc erc-capab
erc-autoaway cus-edit ediff-ptch ediff-vers ediff ediff-merg ediff-mult
ediff-wind ediff-diff ediff-help ediff-init ediff-util woman sh-script
executable grep ibuf-ext ibuffer ibuffer-loaddefs goto-addr ffap
thai-util thai-word lao-util enriched macrostep-c cmacexp libgl-doc
face-remap cal-move play-sound smerge-mode diff completion pcase pulse
apropos vc-git erc-list erc-menu erc-join erc-ring erc-networks
erc-pcomplete erc-track erc-match erc-button erc-fill erc-stamp
erc-netsplit erc-goodies erc erc-backend erc-compat erc-loaddefs
mhtml-mode css-mode smie color js moz cc-mode cc-fonts cc-guess cc-menus
cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs tabify eieio-opt
speedbar sb-image ezimage dframe man org-element avl-tree ol-eww eww
mm-url url-queue ol-rmail ol-mhe ol-irc ol-info ol-gnus nnir gnus-sum
url url-proxy url-privacy url-expand url-methods url-history mailcap shr
url-cookie url-domsuf url-util svg xml gnus-group gnus-undo gnus-start
gnus-cloud nnimap nnmail mail-source utf7 netrc nnoo gnus-spec gnus-int
gnus-range gnus-win gnus nnheader wid-edit ol-docview doc-view
image-mode exif ol-bibtex bibtex ol-bbdb ol-w3m org ob ob-tangle ob-ref
ob-lob ob-table ob-exp org-macro org-footnote org-src ob-comint
org-pcomplete org-list org-faces org-entities org-version ob-emacs-lisp
ob-core ob-eval org-table ol org-keys org-compat org-macs org-loaddefs
xr tar-mode pcmpl-unix pcmpl-gnu lisp-cycle view jka-compr gcl-info
network-stream nsm debug parse-time iso8601 help-fns radix-tree cl-print
server add-log dired-aux)

ERC does not immediately trigger this bug.

In GNU Emacs 27.2 (build 1, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G95))
 of 2021-03-27 built on builder10-14.porkrind.org
Windowing system distributor 'Apple', version 10.3.1671
System Description:  Mac OS X 10.14.6

Recent messages:
emacs	27.2	/Users/devon/.emacs
Appointment reminders enabled (no diary file found)
Idle timer set to 5 minutes
Loading gud...done
For information about GNU Emacs and the GNU system, type C-h C-a.
Package cl is deprecated
Mark set
user-error: No window right from selected window
Configured using:
 'configure --with-ns '--enable-locallisppath=/Library/Application
 Support/Emacs/${version}/site-lisp:/Library/Application
 Support/Emacs/site-lisp' --with-modules'

Configured features:
NOTIFY KQUEUE ACL GNUTLS LIBXML2 ZLIB TOOLKIT_SCROLL_BARS NS MODULES
THREADS JSON PDUMPER GMP

Important settings:
  value of $LANG: en_BE <at> currency=USD.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
CLEAN                       	DIRTY
                            	erc-list-mode: t
                            	erc-menu-mode: t
                            	erc-autojoin-mode: t
                            	erc-ring-mode: t
                            	erc-networks-mode: t
                            	erc-pcomplete-mode: t
                            	erc-track-mode: t
                            	erc-track-minor-mode: t
                            	erc-match-mode: t
                            	erc-button-mode: t
                            	erc-fill-mode: t
                            	erc-stamp-mode: t
                            	erc-netsplit-mode: t
                            	erc-irccontrols-mode: t
                            	erc-noncommands-mode: t
                            	erc-move-to-prompt-mode: t
                            	erc-readonly-mode: t
  hi-lock-mode: t           	hi-lock-mode: t
  gud-tooltip-mode: t       	gud-tooltip-mode: t
  display-time-mode: t      	display-time-mode: t
  which-function-mode: t    	which-function-mode: t
  shell-dirtrack-mode: t    	shell-dirtrack-mode: t
  tooltip-mode: t           	tooltip-mode: t
  global-eldoc-mode: t      	global-eldoc-mode: t
  eldoc-mode: t             	eldoc-mode: t
  electric-indent-mode: t   	electric-indent-mode: t
  mouse-wheel-mode: t       	mouse-wheel-mode: t
  menu-bar-mode: t          	menu-bar-mode: t
  file-name-shadow-mode: t  	file-name-shadow-mode: t
  global-font-lock-mode: t  	global-font-lock-mode: t
  font-lock-mode: t         	font-lock-mode: t
  blink-cursor-mode: t      	blink-cursor-mode: t
  auto-composition-mode: t  	auto-composition-mode: t
  auto-encryption-mode: t   	auto-encryption-mode: t
  auto-compression-mode: t  	auto-compression-mode: t
  temp-buffer-resize-mode: t	temp-buffer-resize-mode: t
  line-number-mode: t       	line-number-mode: t
  transient-mark-mode: t    	transient-mark-mode: t

Load-path shadows:
/Applications/Emacs.app/Contents/Resources/lisp/frame hides /Users/devon/emacs/frame
/Applications/Emacs.app/Contents/Resources/lisp/emacs-lisp/cl-macs hides /Users/devon/emacs/cl-macs
/Applications/Emacs.app/Contents/Resources/lisp/mail/sendmail hides /Users/devon/emacs/sendmail
/Applications/Emacs.app/Contents/Resources/lisp/play/morse hides /Users/devon/emacs/morse
/Applications/Emacs.app/Contents/Resources/lisp/indent hides /Users/devon/emacs/indent
/Applications/Emacs.app/Contents/Resources/lisp/forms hides /Users/devon/emacs/forms
/Applications/Emacs.app/Contents/Resources/lisp/mail/hashcash hides /Users/devon/emacs/hashcash
/Applications/Emacs.app/Contents/Resources/lisp/progmodes/inf-lisp hides /Users/devon/emacs/inf-lisp
~/emacs/swift-mode/swift-mode hides /Users/devon/emacs/swift-mode
/Applications/Emacs.app/Contents/Resources/lisp/dired-aux hides /Users/devon/emacs/dired-aux
/Applications/Emacs.app/Contents/Resources/lisp/json hides /Users/devon/emacs/json
/Applications/Emacs.app/Contents/Resources/lisp/net/shr hides /Users/devon/emacs/shr
/Applications/Emacs.app/Contents/Resources/lisp/replace hides /Users/devon/emacs/replace
/Applications/Emacs.app/Contents/Resources/lisp/textmodes/sgml-mode hides /Users/devon/emacs/sgml-mode
/Applications/Emacs.app/Contents/Resources/lisp/comint hides /Users/devon/emacs/comint
/Applications/Emacs.app/Contents/Resources/lisp/xml hides /Users/devon/emacs/xml
/Applications/Emacs.app/Contents/Resources/lisp/emacs-lisp/regexp-opt hides /Users/devon/emacs/regexp-opt
/Applications/Emacs.app/Contents/Resources/lisp/emacs-lisp/advice hides /Users/devon/emacs/advice
/Applications/Emacs.app/Contents/Resources/lisp/emacs-lisp/lisp hides /Users/devon/emacs/lisp
/Applications/Emacs.app/Contents/Resources/lisp/progmodes/xscheme hides /Users/devon/emacs/xscheme
/Users/devon/.emacs.d/elpa/csv-mode-1.7/csv-mode hides /Users/devon/emacs/csv-mode
/Applications/Emacs.app/Contents/Resources/lisp/textmodes/picture hides /Users/devon/emacs/picture
/Applications/Emacs.app/Contents/Resources/lisp/progmodes/xref hides /Users/devon/emacs/xref
/Applications/Emacs.app/Contents/Resources/lisp/rect hides /Users/devon/emacs/rect
/Applications/Emacs.app/Contents/Resources/lisp/lpr hides /Users/devon/emacs/lpr
/Applications/Emacs.app/Contents/Resources/lisp/net/tramp-ftp hides /Users/devon/emacs/tramp-ftp

Features:
(shadow mail-extr emacsbug message rmc puny format-spec rfc822 mml
mml-sec epa derived epg epg-config gnus-util rmail rmail-loaddefs
text-property-search time-date mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils hi-lock slime-pale slime-fancy
slime-indentation slime-cl-indent cl-indent slime-trace-dialog
slime-fontifying-fu slime-package-fu slime-references
slime-compiler-notes-tree slime-scratch slime-presentations bridge
slime-macrostep macrostep slime-mdot-fu slime-enclosing-context
slime-fuzzy slime-fancy-trace slime-fancy-inspector slime-c-p-c
slime-editing-commands slime-autodoc slime-repl slime-parse slime
compile arc-mode archive-mode noutline outline pp hyperspec thingatpt
hosts-config hosts windmove gud cus-start cus-load ls-lisp dired-x time
quote mouse-thing lzx iso-transl greek-keys which-func imenu new rect
shell pcomplete bucky cl-extra macosx sort etags fileloop generator xref
project compare-w diff-mode easy-mmode paren advice sgml-mode dom dired
dired-loaddefs info-look ispell disp-table edmacro kmacro supersub
comint ansi-color ring rx finder-inf backtrace help-mode find-func appt
diary-lib diary-loaddefs cal-menu calendar cal-loaddefs cl info
slime-autoloads package easymenu browse-url url-handlers url-parse
auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs
password-cache json subr-x map url-vars seq byte-opt gv bytecomp
byte-compile cconv cl-loaddefs cl-lib tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel term/ns-win ns-win
ucs-normalize mule-util term/common-win 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 kqueue cocoa ns
multi-tty make-network-process emacs)

Memory information:
CLEAN                        	DIRTY
((conses 16 387725 13415)    	((conses 16 3554848 246049)
 (symbols 48 35966 5)            (symbols 48 61485 5)
 (strings 32 178224 2909)        (strings 32 319897 31643)
 (string-bytes 1 4222874)        (string-bytes 1 9301219)
 (vectors 16 33481)              (vectors 16 99794)
 (vector-slots 8 828529 20224)   (vector-slots 8 2295345 485158)
 (floats 8 185 59)               (floats 8 11613 576)
 (intervals 56 260 0)            (intervals 56 347213 7006)
 (buffers 1000 11))              (buffers 1000 210))

Message #8 received at 49622 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Devon Sean McCullough <Devon2020 <at> jovi.net>
Cc: 49622 <at> debbugs.gnu.org
Subject: Re: bug#49622: 27.2; A new MacOS display heisenbug
Date: Sun, 18 Jul 2021 22:00:48 +0300

> From: Devon Sean McCullough <Devon2020 <at> jovi.net>
> Date: Sun, 18 Jul 2021 09:10:11 -0400
> 
> Glyph out of place, vertically shifted downwards:
> 
> Type ;; foo ⟡ bar
> where a box ^ displays in place of the WHITE CONCAVE-SIDED DIAMOND
> which can by typed by C-x 8 RET white concave-sided diamond RET
> but renders as a box instead.
> 
> When I start Emacs, with or without init files,
> the box is rendered in the correct screen position.
> 
> After editing for a while, the box renders on the line below.
> 
> 		Peace
> 			--Devon
> 
> P.S.  Please find screen shots at http://jovi.net/Emacs-Bug/Render
> 
> Any debugging suggestions?

Which font is used here?  Is it the same font in the "good" and the
"bad" display?

And why do you say this is a "new" bug? new as compared to when?

Thanks.

Message #11 received at 49622 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Devon Sean McCullough <Devon2020 <at> jovi.net>
Cc: 49622 <at> debbugs.gnu.org
Subject: Re: bug#49622: 27.2; A new MacOS display heisenbug
Date: Sun, 25 Jul 2021 22:15:10 +0300

[Please use Reply All to keep the bug address on the CC list.]

> From: Devon Sean McCullough <Devon2020 <at> jovi.net>
> Date: Sun, 25 Jul 2021 14:01:38 -0400
> 
> On 2021-07-18 15:00, Eli Zaretskii wrote:
> 
> > Which font is used here?  Is it the same font in the "good" and the
> > "bad" display?
> 
> Emacs 27 and 28 with -Q both report the same font for this character
> and after many trials, both manifest the bug more often than not.

My first suspicion is that this has something to do with your video
driver.

> 		Peace
> 			--Devon
> 
> P.S.  In a "CLEAN" Emacs, C-u C-x =
> 
>               position: 153 of 177 (86%), column: 7
>              character: ⟡ (displayed as ⟡) (codepoint 10209, #o23741, #x27e1)
>                charset: unicode (Unicode (ISO10646))
> code point in charset: 0x27E1
>                 script: symbol
>                 syntax: w 	which means: word
>               category: .:Base
>               to input: type "C-x 8 RET 27e1" or "C-x 8 RET WHITE CONCAVE-SIDED DIAMOND"
>            buffer code: #xE2 #x9F #xA1
>              file code: #xE2 #x9F #xA1 (encoded by coding system utf-8-unix)
>                display: by this font (glyph code)
>      mac-ct:-*-PCMyungjo-normal-normal-normal-*-12-*-*-*-m-0-iso10646-1 (#x26F9)
> 
> Character code properties: customize what to show
>    name: WHITE CONCAVE-SIDED DIAMOND
>    general-category: Sm (Symbol, Math)
>    decomposition: (10209) ('⟡')
> 
> There are text properties here:
>    face                 font-lock-comment-face
>    fontified            t

Since you see just a box, it means this font doesn't support that
character.  So I wonder why this font is used for that character.  Did
you try to install Symbola?

> P.P.S. I added a new screen shot at http://jovi.net/Emacs-Bug/Render
> 
> > And why do you say this is a "new" bug? new as compared to when?
> New to me anyway — my searches turned up no similar bug reports.

New to you because you never saw it before, or new because previous
version(s) didn't have it?

Message #14 received at 49622 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Devon Sean McCullough <Devon2020 <at> jovi.net>, 49622 <at> debbugs.gnu.org
Subject: Re: bug#49622: 27.2; A new MacOS display heisenbug
Date: Sat, 06 Aug 2022 15:17:31 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

>> > And why do you say this is a "new" bug? new as compared to when?
>> New to me anyway — my searches turned up no similar bug reports.
>
> New to you because you never saw it before, or new because previous
> version(s) didn't have it?

This was a year ago -- Devon, are you still seeing these glitches in
recent Emacs versions?

Message #19 received at 49622 <at> debbugs.gnu.org (full text, mbox):

From: Devon Sean McCullough <Devon2020 <at> jovi.net>
To: Lars Ingebrigtsen <larsi <at> gnus.org>, Eli Zaretskii <eliz <at> gnu.org>
Cc: 49622 <at> debbugs.gnu.org
Subject: Re: bug#49622: 27.2; A new MacOS display heisenbug
Date: Sat, 6 Aug 2022 13:23:21 -0400

On 2022-08-06 09:17, Lars Ingebrigtsen wrote:
> Eli Zaretskii <eliz <at> gnu.org> writes:
> This was a year ago -- Devon, are you still seeing these glitches in recent Emacs versions?

Not lately.  I'm running 28.1.

		Peace
			--Devon

Message #22 received at 49622 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Devon Sean McCullough <Devon2020 <at> jovi.net>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 49622 <at> debbugs.gnu.org
Subject: Re: bug#49622: 27.2; A new MacOS display heisenbug
Date: Sun, 07 Aug 2022 14:46:43 +0200

Devon Sean McCullough <Devon2020 <at> jovi.net> writes:

>> This was a year ago -- Devon, are you still seeing these glitches in
>> recent Emacs versions?
>
> Not lately.  I'm running 28.1.

OK; I'm closing this bug report, then.

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