Re: compat31

[Dennis Williamson]

On Mon, Feb 14, 2011 at 9:14 AM, Greg Wooledge <wooledg@eeg.ccf.org> wrote:
> On Mon, Feb 14, 2011 at 09:03:34AM -0600, Dennis Williamson wrote:
>> I'm having a discussion with someone who claims that for them on Bash
>> 4.0.33, with compat31 *off*, they are getting 3.1 behavior with quoted
>> patterns in a =~ match.
>
>> Are there any other circumstances that could
>> produce this behavior?
>
> The most obvious would be that the script is actually being run by
> bash 3.1.  Have him/her do something like echo $BASH_VERSION inside the
> script to be sure.
>

I was hoping for something less obvious. (Well not actually hoping.)

The user is performing this from a shell prompt. I had him try

[[ $BASH_VERSION =~ "4\.0" ]] && echo yes || echo no

which should output "yes" only if he's using Bash 4.0 *and* compat31
is on. He says the output is "yes", but that

shopt -p compat31

says "shopt -u compat31".

I think he's messing with me, unless there's something else going on.
Can you suggest any other tests or any scenarios where this might
occur?