Re: Regex: A case where the longest match isn't being found

[Lawrence Velázquez]

On Thu, Oct 26, 2023, at 7:01 PM, Greg Wooledge wrote:
> On Thu, Oct 26, 2023 at 10:50:13AM -0700, Dan Bornstein wrote:
>> I found a case where the regex evaluator doesn't seem to be finding the 
>> longest possible match for a given expression. The expression works as 
>> expected on an older version of Bash (3.2.57(1)-release 
>> (arm64-apple-darwin22)).
>
> Bash uses the system's (libc) version of regex(3), so the difference
> you're seeing is presumably caused by the apple-darwin22 part, rather
> than the bash 3.2 part.  (Or conversely, caused by the linux-gnu part
> rather than the bash 5.2 part.)

Indeed, on my macOS system *both* 3.2.57 and 5.2.15 output

    $'foo\' x'

and on shbot (the Linux IRC bot used in #bash) *both* 3.2.48 and
5.2.9 output

    $'foo\'

-- 
vq