Use PerlIO::utf8_strict as the default.

[schwern]

Leon suggested using PerlIO::utf8_strict as the default.
#42 (comment)

It seems to work.

I'm assuming there's still value in trying to use :encoding(UTF-8)?
Maybe it's faster? @Leont could you comment?

[Leont]

:utf8_strict is faster and stricter (it never recodes to replacement character U+FFFD but throw an error when decoding a invalid byte sequence), but unlike :utf8 it doesn't always work well on layers without buffer peeking (such as :stdio), but that's not an issue in our case (and just as much an issue in :encoding).

[schwern]

@Leont Soooo... is it ok to always use :utf8_strict?

[schwern]

@Leont Any idea what's happening here? https://travis-ci.org/doherty/utf8-all/jobs/151371914

[HayoBaan]

Any idea what's happening here? https://travis-ci.org/doherty/utf8-all/jobs/151371914

I saw this in the CPAN reports too. It's unrelated to this change. I'll have a look at this after I finish integrating PerlIO::utf8_strict.

[HayoBaan]

I have fixed the build errors! All that was needed was a no warnings FATAL => 'utf8';. Interesting that only for some versions of Perl, the illegal \x{d800} caused this…