Subject: bug#44908: emacs -nw: view-lossage polluted by termcap / terminfo jazz

From: 積丹尼 Dan Jacobson <[email-masked]>
Date: Sat, 28 Nov 2020 03:25:45 +0800

$ emacs -Q -nw
abc123
C-h l

shows:

 ESC [ > ESC [ > 4 1 ; 3 6 2 ; 0 c ESC ] 1 1 ; r g b : 0 0 0 0 / 0 0 0 0 / 0 0 0 0 ESC \ a ;; self-insert-command
 b			;; self-insert-command
 c			;; self-insert-command
 1			;; self-insert-command
 2			;; self-insert-command
 3			;; self-insert-command
 C-h l			;; view-lossage

Notice the super-barfy first line?

The defendant swears he did not type that.

All he typed was the "a".

So please keep your termcap junk to yourself and don't pollute the C-h l
output.

> Well, we need to intiatialze the terminal. emacs -nw is for engineers
> who are used to bugs anyway.

Yeah, but as you see, you are "not in control of your bladder."

If you were, then the first line wouldn't shove the the innocent user's
"a ;; self-insert-command"
all the way to the right.

> Well it is just the first line of the evening. Surely they will type
> more before wanting to hit C-h l. That way they usually won't notice
> the bug. In fact if they type just a couple of lines of text then that
> jazz will be pushed so far up that, well, let's just say nobody will
> ever know.

emacs-version "27.1"