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bug#38173: describe-variable: Also tell user *where* variable was change
From: |
Katsumi Yamaoka |
Subject: |
bug#38173: describe-variable: Also tell user *where* variable was changed |
Date: |
Tue, 12 Nov 2019 11:28:20 +0900 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (x86_64-pc-cygwin) |
On Tue, 12 Nov 2019 09:14:58 +0800, 積丹尼 Dan Jacobson wrote:
> ^H v w3m-command
> w3m-command is a variable defined in ‘w3m.el’.
> Its value is "/usr/bin/w3m"
> Original value was nil
Please read the doc string for the reason why it is changed.
> User thinks:
> Hmmm, it was changed I see.
> Where did the change happen?
> Did it get changed in w3m.el? But that's where it was first defined. So
> it wouldn't have happened there.
w3m.el does it. I don't know why the original author designed
it so to be changed from the default nil to a reasonable value
instead of making it default to it. Anyway it will be changed
if and only if it was nil initially; you can set it as you like.
> He looks in .emacs . Wait, he doesn't even have a .emacs.
> He gives up.
> So you only tell him half the story.
> Either record at least the last place a variable was changed.
> Or don't tell him it was changed.
> emacs-version "26.3" .
> Yes, if he changed in by hand in his *scratch* buffer etc., even say that too.
I think it is very useful for debugging if I can see what changed
it and when it was changed, though I also think it would cost.
- bug#38173: describe-variable: Also tell user *where* variable was changed, 積丹尼 Dan Jacobson, 2019/11/11
- bug#38173: describe-variable: Also tell user *where* variable was changed,
Katsumi Yamaoka <=
- bug#38173: describe-variable: Also tell user *where* variable was changed, 積丹尼 Dan Jacobson, 2019/11/11
- bug#38173: describe-variable: Also tell user *where* variable was changed, Phil Sainty, 2019/11/12
- bug#38173: describe-variable: Also tell user *where* variable was changed, 積丹尼 Dan Jacobson, 2019/11/12
- bug#38173: describe-variable: Also tell user *where* variable was changed, Phil Sainty, 2019/11/13
- bug#38173: describe-variable: Also tell user *where* variable was changed, 積丹尼 Dan Jacobson, 2019/11/13
- bug#38173: describe-variable: Also tell user *where* variable was changed, Phil Sainty, 2019/11/13
- bug#38173: describe-variable: Also tell user *where* variable was changed, Lars Ingebrigtsen, 2019/11/14