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Multiline PROMPT eats line on zle redisplay (when first line is full-width)

X-seq: zsh-workers 41053
From: Ole Jørgen Brønner <olejorgenb@xxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: Multiline PROMPT eats line on zle redisplay (when first line is full-width)
Date: Sun, 7 May 2017 21:31:04 +0200
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To reproduce:

PROMPT="${(l:$COLUMNS::-:)}
> "
function redisp { zle redisplay; }
zle -N redisp
bindkey "^Q" redisp

Press ctrl-q and the line above the prompt is gone

Use $COLUMNS - 1 instead and everything works fine.

Tested on aa8157b463c18489b378da322f46574bd9ab8dbb (May 1 2017) with `zsh -f`


Ole J (not subscribed so CC is appreciated)

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