--- /dev/null
+#!perl
+
+use strict;
+use warnings;
+
+use Config qw/%Config/;
+
+BEGIN {
+ if (!$Config{useithreads}) {
+ require Test::More;
+ Test::More->import;
+ plan(skip_all => 'This perl wasn\'t built to support threads');
+ }
+}
+
+use threads;
+
+use Test::More;
+
+BEGIN {
+ require autovivification;
+ if (autovivification::A_THREADSAFE()) {
+ plan tests => 1;
+ defined and diag "Using threads $_" for $threads::VERSION;
+ } else {
+ plan skip_all => 'This autovivification isn\'t thread safe';
+ }
+}
+
+sub run_perl {
+ my $code = shift;
+
+ my $SystemRoot = $ENV{SystemRoot};
+ local %ENV;
+ $ENV{SystemRoot} = $SystemRoot if $^O eq 'MSWin32' and defined $SystemRoot;
+
+ system { $^X } $^X, '-T', map("-I$_", @INC), '-e', $code;
+}
+
+SKIP:
+{
+ skip 'Fails on 5.8.2 and lower' => 1 if $] <= 5.008002;
+
+ my $status = run_perl <<' RUN';
+ my $code = 1 + 2 + 4;
+ use threads;
+ $code -= threads->create(sub {
+ eval q{no autovivification; my $x; my $y = $x->{foo}; $x};
+ return defined($x) ? 0 : 1;
+ })->join;
+ $code -= defined(eval q{my $x; my $y = $x->{foo}; $x}) ? 2 : 0;
+ $code -= defined(eval q{no autovivification; my $x; my $y = $x->{foo}; $x})
+ ? 0 : 4;
+ exit $code;
+ RUN
+ is $status, 0, 'loading the pragma in a thread and using it outside doesn\'t segfault';
+}