GNU bug report logs - #73863
30.0.91; Unexpected cursor movement with flymake-show-diagnostics-at-end-of-line

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Romain Ouabdelkader <romain.ouabdelkader <at> gmail.com>
Cc: 73863 <at> debbugs.gnu.org
Subject: bug#73863: 30.0.91; Unexpected cursor movement with flymake-show-diagnostics-at-end-of-line
Date: Sat, 19 Oct 2024 16:15:59 +0300

> From: Romain Ouabdelkader <romain.ouabdelkader <at> gmail.com>
> Date: Fri, 18 Oct 2024 21:10:02 +0200
> Cc: 73863 <at> debbugs.gnu.org
> 
> I can reproduce the issue on a C source file with clangd:
> 
> emacs -Q
> M-x eglot
> (setq flymake-show-diagnostics-at-end-of-line t)
> 
> ```
> unknown_function
> void func();
> ```
> Screenshot 2024-10-18 at 21.06.43.png
> 
> I can also reproduce on a elisp file without using eglot or any additional packages:
> 
> emacs -Q /tmp/test.el
> M-x flymake-mode
> (setq flymake-show-diagnostics-at-end-of-line t)
> 
> ```
> ;;; test.el --- Test for flymake diagnostics -*- lexical-binding: t -*-
> ;;; Commentary:
> 
> ;;; Test file
> 
> very_long_variable_name_to_make_flymake_diagnostics_on_multiple_line
> 
> ;;; Code:
> 
> (provide 'test)
> ;;; test.el ends here
> ```
> 
> Screenshot 2024-10-18 at 21.02.10.png
> 
> Make sure that the diagnostic is displayed on multiple lines (resize your window if necessary). Place your
> cursor on `very_long_variable_name_to_make_flymake_diagnostics_on_multiple_line` and then press down.

So this problem only happens when the window is not wide enough, and
the diagnostic wraps to the next screen line?

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