From @zoffixznet

In none of these cases is the use of variables actually useless​:

<Zoffix__> m​: my ($sensor1, $sensor2, $sensor3); $sensor1 notandthen $sensor2 notandthen $sensor3 notandthen 'did not find a working sensor!'.say;
<camelia> rakudo-moar 64e898​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use of $sensor3 in sink context (line 1)␤Useless use of $sensor2 in sink context (line 1)␤did not find a working sensor!␤»

<Zoffix__> m​: my ($sensor1, $sensor2, $sensor3) := (1, 2, 3); $sensor1 andthen $sensor2 andthen $sensor3 andthen 'did not find a working sensor!'.say;
<camelia> rakudo-moar 64e898​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use of $sensor3 in sink context (line 1)␤Useless use of $sensor2 in sink context (line 1)␤did not find a working sensor!␤»

<Zoffix__> m​: m​: my ($sensor1, $sensor2, $sensor3); $sensor1 orelse $sensor2 orelse $sensor3 orelse 'did not find a working sensor!'.say;
<camelia> rakudo-moar 64e898​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use of $sensor3 in sink context (line 1)␤Useless use of $sensor2 in sink context (line 1)␤did not find a working sensor!␤»

From @zoffixznet

On Sat, 03 Jun 2017 07​:14​:59 -0700, cpan@​zoffix.com wrote​:

In none of these cases is the use of variables actually useless​:

<Zoffix__> m​: my ($sensor1, $sensor2, $sensor3); $sensor1 notandthen
$sensor2 notandthen $sensor3 notandthen 'did not find a working
sensor!'.say;
<camelia> rakudo-moar 64e898​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use
of $sensor3 in sink context (line 1)␤Useless use of $sensor2 in sink
context (line 1)␤did not find a working sensor!␤»

<Zoffix__> m​: my ($sensor1, $sensor2, $sensor3) := (1, 2, 3); $sensor1
andthen $sensor2 andthen $sensor3 andthen 'did not find a working
sensor!'.say;
<camelia> rakudo-moar 64e898​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use
of $sensor3 in sink context (line 1)␤Useless use of $sensor2 in sink
context (line 1)␤did not find a working sensor!␤»

<Zoffix__> m​: m​: my ($sensor1, $sensor2, $sensor3); $sensor1 orelse
$sensor2 orelse $sensor3 orelse 'did not find a working sensor!'.say;
<camelia> rakudo-moar 64e898​: OUTPUT​: «WARNINGS for <tmp>​:␤Useless use
of $sensor3 in sink context (line 1)␤Useless use of $sensor2 in sink
context (line 1)␤did not find a working sensor!␤»

Thank you for the report. This is now fixed.

Fix​: rakudo/rakudo@d30e5b1e32
Tests​: rakudo/rakudo@d30e5b1e32

@zoffixznet - Status changed from 'new' to 'resolved'