[rt.cpan.org #121128] Test failures on Cygwin

Sat Apr 15 13:14:49 2017: Request 121128 was acted upon.
Transaction: Correspondence added by RSCHUPP
       Queue: Module-ScanDeps
     Subject: Test failures on Cygwin
   Broken in: (no value)
    Severity: (no value)
       Owner: Nobody
  Requestors: [email protected]
      Status: open
 Ticket <URL: https://rt.cpan.org/Ticket/Display.html?id=121128 >


On 2017-04-15 07:44:44, [email protected] wrote:
> Attached.

Yep, that is exactly the output you would get when forcing 
t/10-case-insensitive-keys.t to run (not skip) on a case-sensitive filesystem.

> By the way, my file system is set up to be case sensitive, which I guess 
> is the same as case_intolerant.  

:) "case intolerant" sounds like some form of allergy to me

> I wonder if the problem is that the File::Spec 
> module didn't detect this; shouldn't the test have been skipped?

I looked at File::Spec::Cygwin (from Perl 5.24.1) and it has indeed a Cygwin specific
File::Spec::case_tolerant. Sorry, I have no machine to test this, but on 
first glance this test looks suspicious since there's no "use Cygwin":

sub case_tolerant {
  return 1 unless $^O eq 'cygwin'
    and defined &Cygwin::mount_flags;
...

Do the following two oneliners produce different output?

perl -E 'say "DEFINED" if defined &Cygwin::mount_flags'
perl -MCygwin -E 'say "DEFINED" if defined &Cygwin::mount_flags'

Cheers, Roderich