From @bbkr

I've made this stupid mistake and was unable to find bug (space between bracket and open) due to misleading error message.

$ perl6 -e 'my $f = open ("logo_32x32.png", :bin); say $f.read(1e5).bytes; $f.close;'
This type cannot unbox to a native string

moritz @​ 1​:54
still the error is LTA
it should eithe constrain the type to Str, or should coerce to it

tadzik @​ 1​:55
the first thing we ever put into Perl​::Critic is checking for things like this
subcall (foo); "please write me as subcall((foo)) to not confuse everybody"

From @coke

On Fri Jul 13 05​:00​:25 2012, pawel.pabian@​implix.com wrote​:

I've made this stupid mistake and was unable to find bug (space
between bracket and open) due to misleading error message.

$ perl6 -e 'my $f = open ("logo_32x32.png", :bin); say
$f.read(1e5).bytes; $f.close;'
This type cannot unbox to a native string

moritz @​ 1​:54
still the error is LTA
it should eithe constrain the type to Str, or should coerce to it

tadzik @​ 1​:55
the first thing we ever put into Perl​::Critic is checking for things
like this
subcall (foo); "please write me as subcall((foo)) to not confuse
everybody"

Behavior has changed​:

$ ./perl6 -e 'my $f = open ("./perl6", :bin); say $f.read(1e5).bytes; $f.close;'
Failed to open file /Users/coke/sandbox/rakudo/perl6 bin True​: no such file or directory
  in block <unit> at -e​:1

$ ./perl6 --version
This is perl6 version 2015.06-217-g3776723 built on MoarVM version 2015.06-48-g017d184
--
Will "Coke" Coleda

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

From @dogbert17

Message still looks fine with
'This is Rakudo version 2017.09-348-g830084430 built on MoarVM version 2017.09.1-575-gd4e230a69'
perhaps this ticket should be closed.