From @FROGGS

This feels rather inconsistent​:

m​: my $a = (1, 2, 3); say $a; say $a.WHAT; $a[1] = 42
rakudo-moar 467b79​: OUTPUT«(1 2 3)␤(List)␤Cannot modify an immutable
Int␤ in block <unit> at /tmp/46mt71Ed8W​:1␤␤»

m​: my $a = [1, 2, 3]; say $a = $a[*]; say $a.WHAT; $a[1] = 42; say $a
rakudo-moar 467b79​: OUTPUT«(1 2 3)␤(List)␤(1 42 3)␤»

From @jnthn

On Wed Sep 02 05​:06​:50 2015, FROGGS.de wrote​:

This feels rather inconsistent​:

m​: my $a = (1, 2, 3); say $a; say $a.WHAT; $a[1] = 42
rakudo-moar 467b79​: OUTPUT«(1 2 3)␤(List)␤Cannot modify an immutable
Int␤ in block <unit> at /tmp/46mt71Ed8W​:1␤␤»

Here, you have a List of three literal Int objects. And Int is not a container and cannot be assigned to.

m​: my $a = [1, 2, 3]; say $a = $a[*]; say $a.WHAT; $a[1] = 42; say $a
rakudo-moar 467b79​: OUTPUT«(1 2 3)␤(List)␤(1 42 3)␤»

Here you have a List of 3 Scalar containers, which happen to contain Ints. Indexing an array has to return its containers, since that's what makes an array element assignable. And that is why you can assign here. It's the same reason that​:

($x, $y) = 3, 4;

Also works, but​:

(1, 2) = 3, 4;

Does not.

The RT System itself - Status changed from 'new' to 'open'

@jnthn - Status changed from 'open' to 'rejected'