Test failure in t/spec/S19-command-line/dash-e.t

[p6rt]

Migrated from rt.perl.org#126993 (status was 'new')

Searchable as RT126993$

[p6rt]

From sinan@unur.com

When running the test with the original file which has​:

is_run $x, :args['-e', "print q[\c[LATIN SMALL LETTER A WITH DOT ABOVE]]"],
{
  out => "\c[LATIN SMALL LETTER A WITH DOT ABOVE]",
  err => '',
  status => 0,
}, '-e print $something works with non-ASCII string literals';

I get​:

# Failed test '-e print $something works with non-ASCII string literals'
# at D​:\Src\rakudo\t\spec\packages\Test\Util.pm line 58
# got out​: "?"
# expected out​: "ȧ"

If I change the test to

is_run $x, :args['-e', "print q[å]"],
  {
  out => "å",

I get​:

ok 2 - -e print $something works with non-ASCII string literals

However, if I replace it with the intended character​:

is_run $x, :args['-e', "print q[ȧ]"],
  {
  out => "ȧ",

I again get​:

# Failed test '-e print $something works with non-ASCII string literals'
# at D​:\Src\rakudo\t\spec\packages\Test\Util.pm line 58
# got out​: "?"
# expected out​: "ȧ"

The test file is encoded as UTF-8, the codepage is set to 65001 in my
command prompt window.

I don't understand why å works but ȧ fails, except that the former is
in "Latin-1 Supplement" and the latter is in "Latin Extended-B".

Also, for reference​:

# Failed test '-e print $something works with non-ASCII string literals'
# at D​:\Src\rakudo\t\spec\packages\Test\Util.pm line 58
# got out​: "i"
# expected out​: "ı"

# Failed test '-e print $something works with non-ASCII string literals'
# at D​:\Src\rakudo\t\spec\packages\Test\Util.pm line 58
# got out​: "g"
# expected out​: "ğ"

Now, Windows command prompt is probably not where I would expect this
to work, except that maybe it can work, so I am reporting it as a
possible bug.

Here's my environment and build info​:

C​:\> ver
Microsoft Windows [Version 10.0.10586]

C​:\> cl
Microsoft (R) C/C++ Optimizing Compiler Version 18.00.31101 for x64

C​:\> nmake /?
Microsoft (R) Program Maintenance Utility Version 12.00.21005.1

C​:\> D​:\Src\rakudo\perl6 -V
...
perl6​::language_version=6.b
perl6​::codename=
perl6​::release-number=
perl6​::build-date=2015-12-22T15​:06​:37Z
perl6​::version=2015.11-718-g73d193b
perl6​::implementation=Rakudo