From @masak

<masak> rakudo​: my $a = 1, 2, 3; my @​a = |$a; say @​a.perl
<p6eval> rakudo 7ef386​: too many positional arguments​: 4 passed, 2
expected [...]
<masak> uh.
<masak> did I just confuse the assignment builtin?
<JimmyZ> rakudo​: my $a = 1, 2, 3; |$a.say;
<p6eval> rakudo 7ef386​: 123␤
<JimmyZ> hmm, that's used to flatten args.
<masak> rakudo​: my @​a = 1, 2, 3; my $a = |@​a
<p6eval> rakudo 7ef386​: too many positional arguments​: 4 passed, 2
expected [...]
<masak> JimmyZ​: yes, exactly. but assignment is not a call.
<JimmyZ> yes
<masak> so those are not args.
<JimmyZ> rakudo​: my $a = 1, 2, 3; my @​b = (|$a) ; @​b.perl.say;
<p6eval> rakudo 7ef386​: [[1, 2, 3]]␤
<masak> I'll just pre-emptively submit it as a bug, and we'll see what happens.
* masak submits
<JimmyZ> it'd be a bug.
<masak> at the very least, it's less than... clear what happens. :)

From @coke

Output has changed​:

On Thu Dec 03 19​:17​:58 2009, masak wrote​:

<masak> rakudo​: my $a = 1, 2, 3; my @​a = |$a; say @​a.perl
<p6eval> rakudo 7ef386​: too many positional arguments​: 4 passed, 2
expected [...]

[\(1)]

<masak> uh.
<masak> did I just confuse the assignment builtin?
<JimmyZ> rakudo​: my $a = 1, 2, 3; |$a.say;
<p6eval> rakudo 7ef386​: 123␤

1

<JimmyZ> hmm, that's used to flatten args.
<masak> rakudo​: my @​a = 1, 2, 3; my $a = |@​a
<p6eval> rakudo 7ef386​: too many positional arguments​: 4 passed, 2
expected [...]

Capture()<0x10d76dd60>

<masak> JimmyZ​: yes, exactly. but assignment is not a call.
<JimmyZ> yes
<masak> so those are not args.
<JimmyZ> rakudo​: my $a = 1, 2, 3; my @​b = (|$a) ; @​b.perl.say;
<p6eval> rakudo 7ef386​: [[1, 2, 3]]␤

[\(1)]

<masak> I'll just pre-emptively submit it as a bug, and we'll see what
happens.
* masak submits
<JimmyZ> it'd be a bug.
<masak> at the very least, it's less than... clear what happens. :)

Is this better?

--
Will "Coke" Coleda

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

From @diakopter

All of those now fail with​:

16​:29 <p6eval> rakudo 024843​: OUTPUT«===SORRY!===␤CHECK
FAILED​:␤Undefined routine
  '&prefix​:<|>' called (line 1)␤»

From @jnthn

On Thu Dec 03 19​:17​:58 2009, masak wrote​:

<masak> rakudo​: my $a = 1, 2, 3; my @​a = |$a; say @​a.perl
<p6eval> rakudo 7ef386​: too many positional arguments​: 4 passed, 2
expected [...]
<masak> uh.
<masak> did I just confuse the assignment builtin?

These days this gives a useful error​:

$ perl6-m -e "my $a = 1, 2, 3; my @​a = |$a; say @​a.perl"
===SORRY!=== Error while compiling -e
Arg-flattening | is only valid in an argument list
at -e​:1
------> my $a = 1, 2, 3; my @​a = |<HERE>$a; say @​a.perl

Added a test in S32-exceptions/misc.t; resolving.

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