From @coke

This dies, but only on the JVM​:

13​:41 < [Coke]> r​: sub foo($a) { sub bar {} }; my $a=foo(1);
13​:41 <+camelia> rakudo-moar a05867​: ( no output )
13​:41 <+camelia> ..rakudo-jvm a05867​: OUTPUT«java.lang.NullPointerException␤
  in block <unit> at /tmp/tmpfile​:1␤␤»

It's required for (at least) several tests in S02-magicals/sub.t

Also​:

13​:42 < lizmat> [Coke]​: that is a known issue, several places in the core work
  around that
13​:42 < lizmat> r​: sub foo($a) { my $ = sub bar {} }; my $a=foo(1);
13​:42 <+camelia> rakudo-{moar,jvm} a05867​: ( no output )

--
Will "Coke" Coleda

From @usev6

On Sat Oct 31 10​:56​:36 2015, coke wrote​:

This dies, but only on the JVM​:

13​:41 < [Coke]> r​: sub foo($a) { sub bar {} }; my $a=foo(1);
13​:41 <+camelia> rakudo-moar a05867​: ( no output )
13​:41 <+camelia> ..rakudo-jvm a05867​:
OUTPUT«java.lang.NullPointerException␤
in block <unit> at /tmp/tmpfile​:1␤␤»

It's required for (at least) several tests in S02-magicals/sub.t

This was fixed with Raku/nqp@2d88d98201. The tests in S02-magicals/sub.t are passing (again).

Also​:

13​:42 < lizmat> [Coke]​: that is a known issue, several places in the
core work
around that
13​:42 < lizmat> r​: sub foo($a) { my $ = sub bar {} }; my $a=foo(1);
13​:42 <+camelia> rakudo-{moar,jvm} a05867​: ( no output )

@​lizmat​: Are you able to point out those places in the core, perchance? Maybe some workarounds could be removed now?

--
Christian

@usev6 - Status changed from 'new' to 'open'

From @lizmat

Christian,

On 06 Oct 2016, at 22​:23, Christian Bartolomaeus via RT <bugs-comment@​bugs6.perl.org> wrote​:

13​:42 < lizmat> [Coke]​: that is a known issue, several places in the
core work
around that
13​:42 < lizmat> r​: sub foo($a) { my $ = sub bar {} }; my $a=foo(1);
13​:42 <+camelia> rakudo-{moar,jvm} a05867​: ( no output )

@​lizmat​: Are you able to point out those places in the core, perchance? Maybe some workarounds could be removed now?

src/core/metaops.pm

METAOP_REDUCE_LEFT
METAOP_REDUCE_RIGHT
METAOP_REDUCE_LIST
METAOP_REDUCE_LISTINFIX
METAOP_REDUCE_CHAIN

Liz

From @usev6

On Thu Oct 06 16​:07​:15 2016, elizabeth wrote​:

[...]

13​:42 < lizmat> [Coke]​: that is a known issue, several places in the
core work
around that
13​:42 < lizmat> r​: sub foo($a) { my $ = sub bar {} }; my $a=foo(1);
13​:42 <+camelia> rakudo-{moar,jvm} a05867​: ( no output )

@​lizmat​: Are you able to point out those places in the core,
perchance? Maybe some workarounds could be removed now?

src/core/metaops.pm

METAOP_REDUCE_LEFT
METAOP_REDUCE_RIGHT
METAOP_REDUCE_LIST
METAOP_REDUCE_LISTINFIX
METAOP_REDUCE_CHAIN

Thanks, Liz!

Indeed, it looks like those workarounds are no longer needed. I had a clean spectest on JVM after cleaning up src/core/metaops.pm and opened a pull request​: rakudo/rakudo#898

I'm closing this ticket as resolved.

--
Christian

@usev6 - Status changed from 'open' to 'resolved'