bug#34192: 26.1; Bash 5.0 breaks TRAMP sudo

[Michael Albinus]

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Subject: Re: bash 5.0 dies with HISTSIZE=0
From: Chet Ramey <chet.ramey@case.edu>
Date: Wed, 20 Feb 2019 16:23:23 -0500

On 2/20/19 8:10 AM, Michael Albinus wrote:

> Bash Version: 5.0
> Patch Level: 0
> Release Status: release
> 
> Description:
> This is an error report from an Emacs/Tramp user. With bash 5.0, bash
> 5.0 dies when HISTSIZE is set to 0. Setting it to 1 seems to work. Using
> bash 4.4 works as well. <See https://debbugs.gnu.org/34192> for details.
> 
> Repeat-By:
> The following is an extract from what Tramp does inside Emacs. I could
> reproduce it in a a shell:
> 
> 
> # env TERM='dumb' INSIDE_EMACS='27.0.50,tramp:2.4.2-pre' ENV='' HISTFILE='' 
> HISTFILESIZE=0 HISTSIZE=0 PROMPT_COMMAND='' PS1=\#\$\  PS2='' PS3='' 
> /home/albinus/src/bash-5.0/bash -norc -noprofile
> #$ tramp_perl_file_name_all_completions () {
> \perl -e '
> opendir(d, $ARGV[0]) || die("$ARGV[0]: $!\nfail\n");

Thanks for the report. Try the attached patch and see if that fixes the
crash.

Chet


-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

history-zero-length.patch
Description: Text document

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