Re: [Bug-readline] Bug: horizontal-scroll-mode on

[Chet Ramey]

On 1/3/15 5:52 PM, Devin Homan wrote:

>>> Pressing enter issues the "eix readline" command.
>>
>> I can't reproduce this.  The potential redisplay issues aside, if you
>> have a file named `readline' in the current directory, or if the
>> completion for `eix' returns `readline' as the only alternative, the
>> word should expand to readlineline (or readline/line if readline is a
>> directory).  Completion always takes place at the current cursor
>> position, and the reverse history search leaves the cursor before the
>> character found (`l').  When I replace `eix' with `echo', I see
>> `readlineline' displayed as output.
>>
> 
> You seem to have reproduced the bug. I originally posted this on a
> Gentoo forum thinking that this was a Gentoo specific issue. eix was a
> bad example being a distro specific command. But you still got the same
> result with 'echo readline'. The specific command does not matter, all
> that matters is the expansion. If I execute 'echo echo' (to put that
> command into the history buffer) with 'set horizontal-scroll-mode on'
> in .inputrc, and then do a reverse search for that command with 'Ctrl-r
> e' to search for a previously executed command having the letter 'e' and
> then tab complete, I get 'echo echoecho' with the cursor at the second
> 'e'. When I hit enter I get the result for the command 'echo echo'.

This is what I cannot reproduce.  The expansion is correct.  If I run
`echo echo' and then type ^Re, whether horizontal scroll mode is enabled
or not, I get the cursor positioned before the `e' in the second echo,
and readline rings the bell to indicate there are no (or more than one)
completions.  If I hit return, I see `echo' displayed.

The `echo readlineline' from the previous example is another example of
the same correct behavior.

I'm using bash-4.3.30.  There was a previous patch (bash-4.3.13/
readline-6.3.6) that affected horizontal scrolling, but I don't know
what version you're using.  Distribution version numbers are not
necessarily related to the upstream patch level.

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/