From rightfold@gmail.com

'-'.IO behaves as $*IN in some cases, like expected, but crashes with
slurp. '-'.IO.spurt works as expected; writing to $*OUT. It appears also
that '-'.IO is not very well tested in roast, and it is not documented
in the API documentation of IO​::Path either, so maybe those points
should be addressed as well.

  $ perl6 --version
  This is Rakudo version 2017.04.3 built on MoarVM version
2017.04-53-g66c6dda
  implementing Perl 6.c.
  $ perl6
  To exit type 'exit' or '^D'
  > '-'.IO.slurp
  P6opaque​: no such attribute '$!PIO' in type IO​::Handle when trying
to get a value
  in block <unit> at <unknown file> line 1

From @MasterDuke17

On Sat, 03 Jun 2017 12​:47​:03 -0700, rightfold@​gmail.com wrote​:

'-'.IO behaves as $*IN in some cases, like expected, but crashes with
slurp. '-'.IO.spurt works as expected; writing to $*OUT. It appears also
that '-'.IO is not very well tested in roast, and it is not documented
in the API documentation of IO​::Path either, so maybe those points
should be addressed as well.

  $ perl6 \-\-version
  This is Rakudo version 2017\.04\.3 built on MoarVM version

2017.04-53-g66c6dda
implementing Perl 6.c.
$ perl6
To exit type 'exit' or '^D'
> '-'.IO.slurp
P6opaque​: no such attribute '$!PIO' in type IO​::Handle when trying
to get a value
in block <unit> at <unknown file> line 1

Some info about where different changes happened https://irclog.perlgeek.de/perl6-dev/2017-06-03#i_14680402

From @zoffixznet

On Sat, 03 Jun 2017 12​:47​:03 -0700, rightfold@​gmail.com wrote​:

'-'.IO behaves as $*IN in some cases, like expected, but crashes with
slurp. '-'.IO.spurt works as expected; writing to $*OUT. It appears also
that '-'.IO is not very well tested in roast, and it is not documented
in the API documentation of IO​::Path either, so maybe those points
should be addressed as well.

  $ perl6 \-\-version
  This is Rakudo version 2017\.04\.3 built on MoarVM version

2017.04-53-g66c6dda
implementing Perl 6.c.
$ perl6
To exit type 'exit' or '^D'
> '-'.IO.slurp
P6opaque​: no such attribute '$!PIO' in type IO​::Handle when trying
to get a value
in block <unit> at <unknown file> line 1

Thank you for the report. This is now fixed.

Fix​: rakudo/rakudo@90d129de8e7ae627
Test​: Raku/roast@60a7a88e479dceb902

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

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