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Re: Probable recursion in particular alias


From: Chet Ramey
Subject: Re: Probable recursion in particular alias
Date: Wed, 9 Jan 2019 10:10:38 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.4.0

On 1/9/19 1:24 AM, Ante Perić wrote:

> Bash Version: 5.0
> Patch Level: 0
> Release Status: release
> 
> Description:
> Having an alias of type:
> alias bug="\
>            echo \"no output, 100% cpu\" \
>           "
> in .bashrc will give no output, will not complete, and it will peg the CPU to 
> 100%.
> 
> Repeat-By:
> Just run the alias as specified in Description section.

I can't reproduce this in non-interactive or interactive shells. Given
this file:

$ cat x18
shopt -s expand_aliases

alias bug="\
           echo \"no output, 100% cpu\" \
          "

bug
bug 1234

I get (non-interactive):

$ ../bash-5.0/bash ./x18
no output, 100% cpu
no output, 100% cpu 1234

and (interactive):

$ ../bash-5.0/bash --rcfile ./x18
no output, 100% cpu
no output, 100% cpu 1234
$ bug
no output, 100% cpu
$ bug 1234
no output, 100% cpu 1234
$ echo $BASH_VERSION
5.0.0(1)-release


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



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