Don't permit running with autodie < 2.12

autodie obliterated the IO layers set by the open pragma prior
to version 2.12, so now we refuse to run with autodie before
that bug was fixed.

RT #54777: autodie loses open pragma
GH #7: autodie breaks the open set by utf8::all

.gitignore

@@ -1,2 +1,3 @@
 utf8-all*
 .build
+*.orig

Changes

@@ -2,6 +2,7 @@ Revision history for Perl module {{$dist->name}}
 
 {{$NEXT}}
     * Use Import::Into instead of home-grown "solution" [GH #10]
+    * Don't permit running with autodie < 2.12, due to RT #54777 [GH #7]
 
 0.004     2012-01-04
     * Fix test suite for less current versions of Perl [getty, doherty]

lib/utf8/all.pm

@@ -65,9 +65,18 @@ sub _encode_argv {
     return;
 }
 
-=for Pod::Coverage
-utf8_open
-unimport
+=head1 INTERACTION WITH AUTODIE
+
+If you use L<autodie>, which is a great idea, you need to use at least version
+B<2.12>, released on L<June 26, 2012|https://metacpan.org/source/PJF/autodie-2.12/Changes#L3>.
+Otherwise, autodie obliterates the IO layers set by the L<open> pragma. See
+L<RT #54777|https://rt.cpan.org/Ticket/Display.html?id=54777> and
+L<GH #7|https://github.com/doherty/utf8-all/issues/7>.
+
 =cut
 
+CHECK {
+    autodie->VERSION(2.12) if $INC{'autodie.pm'};
+}
+
 1;

t/autodie.t

@@ -0,0 +1,17 @@
+use strict;
+use warnings;
+use Test::More;
+use Capture::Tiny qw(capture_merged);
+
+my @code = (
+    q{use autodie;   use utf8::all; 1},
+    q{use utf8::all; use autodie;   1}
+);
+plan tests => 2*@code;
+
+foreach my $code_str (@code) {
+    note $code_str;
+    my $output = capture_merged sub { system( $^X, '-e', $code_str ) };
+    like $output => qr/CHECK/, 'failed b/c of the CHECK block' or diag $output;
+    like $output => qr/autodie.*2\.12/, q{failed b/c of autodie wasn't new enough} or diag $output;
+}