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Re: A question about bash change for efficiency speedups in multibyte lo


From: Chet Ramey
Subject: Re: A question about bash change for efficiency speedups in multibyte locales
Date: Mon, 2 Apr 2018 15:54:32 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

On 3/29/18 9:57 PM, yangyajing wrote:
> Hello,  I recently did lsb-test-core on ubuntu 16.04. There is a test
> that can be successful in bash 4.1 but fails in bash 4.3.
> 
> The test comment is :  bash tp10.sh.
> 
> The content of tp10.sh is :   echo [[:xdigit:]] [[:hyphen:]].
> 
> And this test sets a multibyte locale that defines a charclass
> containing ''hyphen''.
> 
> When I run the tp10.sh script with bash, I find that ''hyphen'' can be
> recognized in bash4.1 but not in bash4.3.
> 
> By comparing the source code, I found that compared to bash4.1, there
> are 2 more lines of code in bash4.3, which in the xstrmatch() function
> in bash/lib/glob/smatch.c.
> The two lines of code are as follows:
> 
> 

Which two lines?

-- 
``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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