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Date: Tue, 06 Aug 2013 12:05:12 +0100
From: Peter Stephenson <p.stephenson@samsung.com>
To: zsh-users@zsh.org
Subject: Re: search through alternative HISTFILE
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On Tue, 06 Aug 2013 12:11:12 +0200
Maarten Grachten <maarten.grachten@ofai.at> wrote:
> Just for the record. I figured out that it is necessary to reset HISTNO 
> to its old value after the search on accumulated history is done 
> (otherwise the normal search will be confused):
> 
> function accumulated-history-incremental-search-backward () {
>      fc -p $ACC_HISTFILE
>      HISTNO=$(( $( wc -l < $ACC_HISTFILE ) + 1 ))
>      zle history-incremental-search-backward
>      fc -P
>      HISTNO=$(( $( wc -l < $HISTFILE ) + 1 ))
> }

Yes, you've now basically got something equivalent to the patch.

pws