From @zhuomingliang

rakudo​: my $x =3; say ++++$x
rakudo 1eef08​: OUTPUT«5â�¤Â»

rakudo​: my $a = 2; $a++++.say;

rakudo 1eef08​: OUTPUT«Cannot assign to readonly valueâ�¤current
instr.​: '&die' pc 17868 (src/builtins/Junction.pir​:393)â�¤Â»

moritz_> it should die like this in the first place
moritz_> because ++$a returns should return an immutable integer

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@coke - Status changed from 'new' to 'open'

From @coke

On Wed May 05 02​:12​:50 2010, jimmy wrote​:

rakudo​: my $x =3; say ++++$x
rakudo 1eef08​: OUTPUT«5â�¤Â»

rakudo​: my $a = 2; $a++++.say;

rakudo 1eef08​: OUTPUT«Cannot assign to readonly valueâ�¤current
instr.​: '&die' pc 17868 (src/builtins/Junction.pir​:393)â�¤Â»

moritz_> it should die like this in the first place
moritz_> because ++$a returns should return an immutable integer

�此�你身��康�天天快�
��亮

14​:32 < [Coke]> rakudo​: my $x =3; say ++++$x
14​:32 <+p6eval> rakudo 356fe7​: OUTPUT«Cannot assign to a readonly
variable or a
  valueâ�¤ in sub prefix​:<++> at
src/gen/CORE.setting​:2241â�¤ in
  block <anon> at /tmp/ufoahxjRzU​:1â�¤ in <anon> at
  /tmp/ufoahxjRzU​:1â�¤â�¤Â»

needs tests.

--
Will "Coke" Coleda

From @moritz

now tested in S03-operators/increment.t

@moritz - Status changed from 'open' to 'resolved'