imapsync/W/learn/bug_io_prompt_local_ARGV

#!/usr/bin/perl

use strict;
use warnings;
use IO::Prompt;

# The defect is when used with a pipe, like the following on the command line example,
# prompt() does not print the prompt string 'Say something: '
# however the variable @ARGV is locally empty.
# The output is then only:
#
# $ echo bla bla bla | ./bug_io_prompt_local_ARGV param1 param2
# ARGV are param1 param2
# You said: bla bla bla

# I tried also 
# prompt( \*STDOUT, 'Say something: ');

# The behavior is ok without the pipe:
# ./bug_io_prompt_local_ARGV param1 param2

print "$IO::Prompt::VERSION\n" ;
print "ARGV are @ARGV\n" ;

my $input = get_stdin();

print "You said: $input\n" ;

sub get_stdin
{
        local(@ARGV) ;
        my $input = prompt( 
                -prompt => 'Say it: ', 
                -echo => '*', 
                -newline => "\nGot it\n" 
        ) ;
        return $input ;
}