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bug#56808: 29.0.50; Elusive display problem on macOS
From: |
Gerd Möllmann |
Subject: |
bug#56808: 29.0.50; Elusive display problem on macOS |
Date: |
Thu, 28 Jul 2022 07:09:34 +0200 |
In GNU Emacs 29.0.50 (build 6, aarch64-apple-darwin21.5.0, NS appkit-2113.60
Version 12.5 (Build 21G72))
of 2022-07-27 built on Mini.fritz.box
Repository revision: de863f70aa905d3a7feaedb58b65bd7f9776853b
Repository branch: master
Windowing system distributor 'Apple', version 10.3.2113
System Description: macOS 12.5
I am meeing a display problem on macOS. I am looking at code like this:
(dap-register-debug-template
(list :name "LLDB Emacs"
:type "lldb-vscode"
When the problem happens, the display looks like
(dap-register-debug-template
(list :name "LLDB Emacs"
:type "lldb-vscode"
I.e. :name and :type don't align anymore.
I haven't been able to find the cause of this, or even been able to make
it reproducible.
Observations I made so far
- The problem might somehow depend on something happening at startup.
When the problem happens after startup, it sticks. When the problem
does not happens, it also remains that way.
- The problem occurs like every 20th Emacs start. Maybe it's even less
frequent.
- I've not been able to reproduce this with -Q.
- The indentation of the :type line above consists of spaces only, which
I mention because there was a recent commit involving stretch glyphs
on macOS. TABs are not present in that line.
- The spaces of the indentation all have default face.
- The mis-indentation increases with the depth of indentation. It's not
a constant offset.
- Curiously, it looks to me like the end position of the indentation
lines up with character boundaries on the line above, but I can't see
the individual pixels here, so that may be wrong.
- Font is Monaco 12.
- Theme is modus-operandi.
- I can't say 100% sure but I might have seen that already last week? I
was looking at a multi-line C function call, where the second line of
arguments wasn't aligned under the ( of the function call. ISTR
wondering slightly why some functions were consistently aligned in a
strange way.
Someone else seeing this, who has another observation to share?
Maybe the same happening with a different font?
- bug#56808: 29.0.50; Elusive display problem on macOS,
Gerd Möllmann <=
- bug#56808: 29.0.50; Elusive display problem on macOS, Eli Zaretskii, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Gerd Möllmann, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Eli Zaretskii, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Gerd Möllmann, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Gerd Möllmann, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Gerd Möllmann, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Gerd Möllmann, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Eli Zaretskii, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Gerd Möllmann, 2022/07/28
- bug#56808: 29.0.50; Elusive display problem on macOS, Eli Zaretskii, 2022/07/28