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Re: bug-report: debug trap messes up pipestatus if containing command su


From: Chet Ramey
Subject: Re: bug-report: debug trap messes up pipestatus if containing command substitution
Date: Wed, 22 May 2019 10:27:39 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:60.0) Gecko/20100101 Thunderbird/60.6.1

On 5/21/19 12:51 AM, Hengyang Zhao wrote:
> Dear bash developers,
> 
> I found an unexpected behavior when engineering some code in a callback of
> DEBUG trap. The code has been distilled to expose this behavior:
> 
> ### BEGIN
> my_func() {
>   local x=$(:)
> }
> trap my_func DEBUG
> false | true | false | true | false
> echo address@hidden
> # expects 1 0 1 0 1
> # gets 0 0 0 0 1
> ### END

Thanks for the report. This appears to be a Linux-only problem (at least I
can't reproduce it on Mac OS X). I'll fix it for the next devel push.

Chet

-- 
``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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