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

[João Távora]

Thanks, I will have a look at this soon.  One thing I don't understand is

the influence of `global-display-line-numbers-mode` in all of this. I suppose

the situation doesn't happen if it's off.  Knowing why will probably solve

the mystery.

Actually, having a look at the backtrace, it seems turning on

display-line-numbers-mode causes the tabulated list to reprint itself via some

hook that is presumably there by default. 

Anyway, this afternoon or tomorrow.

João

On Fri, Apr 10, 2020 at 7:30 AM Eli Zaretskii <eliz@gnu.org> wrote:

> From: Aidan Beggs <nadiasggeb001@gmail.com>
> Date: Thu, 9 Apr 2020 16:55:44 -0400
>
> emacs -Q
> C-x b *scratch*
> M-x global-display-line-numbers-mode
> M-x flymake-mode
> M-x flymake-show-diagnostics-buffer

João, here are the results of my preliminary investigation into this,
as posted on Reddit (where this was first reported), I hope they will
be helpful:

  Under the above settings, flymake--diagnostics-buffer-entries is
  invoked as side effect of calling flymake-diagnostics-buffer-mode from
  flymake-show-diagnostics-buffer, and at that point
  flymake--diagnostics-buffer-source has not yet been set to a valid
  buffer name.  So the with-current-buffer form at the beginning of
  flymake--diagnostics-buffer-entries barfs.

Thanks.

--

João Távora