--- /dev/null
+#!perl
+
+use strict;
+use warnings;
+
+use Test::More tests => 1;
+
+sub run_perl {
+ my $code = shift;
+
+ local %ENV;
+ system { $^X } $^X, '-T', map("-I$_", @INC), '-e', $code;
+}
+
+{
+ my $status = run_perl 'no indirect; print "a\x{100}b" =~ /\A[\x00-\x7f]*\z/;';
+ is $status, 0, 'RT #47866';
+}