undef instances to avoid deadlock in global destruction

t/40http2-header-softerror.t

@@ -42,6 +42,8 @@ subtest "header-values-with-surronding-space" => sub {
     is get_status(), 400;
 };
 
+undef $server;
+
 done_testing;
 
 # connect, send (broken) request, read something

t/40session-ticket.t

@@ -110,8 +110,6 @@ EOT
     $doit->("ascii");
 };
 
-done_testing;
-
 my $server;
 
 sub spawn_with {
@@ -136,3 +134,7 @@ sub test {
         or die "failed to parse the output of s_client:{{{$lines}}}";
     $1;
 }
+
+undef $server;
+
+done_testing;

t/40tunnel.t

@@ -285,4 +285,6 @@ subtest "connect" => sub {
     while (waitpid($upstream_pid, 0) != $upstream_pid) {}
 };
 
+undef $server;
+
 done_testing;

t/50chunked-encoding-proxying.t

@@ -78,4 +78,6 @@ for my $w (1 .. 5) {
 doit("5\r\nHello\r\n5\r\nThere\r\n", "HelloThere", 14);
 
 $socket->close();
+undef $server;
+
 done_testing();

t/50compress-hint.t

@@ -100,4 +100,6 @@ subtest "forcing gzip or br also works" => sub {
 };
 
 $socket->close();
+undef $server;
+
 done_testing();

t/50compress-wetag.t

@@ -68,4 +68,6 @@ subtest "gzip + weak" => sub {
 };
 
 $upstream_listener->close();
+undef $server;
+
 done_testing();

t/50proxy-max-buffer-size.t

@@ -149,4 +149,7 @@ subtest 'http1' => sub {
 #     };
 # };
 
+undef $http1_upstream;
+undef $http2_upstream;
+
 done_testing();

t/50reverse-proxy-chunk-sizes.t

@@ -52,5 +52,7 @@ foreach my $cl (@clopts) {
     }
 }
 
-done_testing();
+undef $upstream;
+undef $server;
 
+done_testing();

t/50reverse-proxy-chunk-trailing-headers.t

@@ -77,5 +77,8 @@ EOR
 
 test(0);
 test(1);
-done_testing();
 
+undef $upstream;
+undef $server;
+
+done_testing();

t/50reverse-proxy-request-bytes.t

@@ -86,5 +86,7 @@ subtest 'streaming' => sub {
     doit(1);
 };
 
-done_testing();
+undef $upstream;
+undef $server;
 
+done_testing();

t/50reverse-proxy-round-robin-weighted.t

@@ -68,4 +68,9 @@ for my $i (1..30) {
 
 isnt $unexpected, 1;
 is((2 * $access_count1), $access_count2, "load balanced");
+
+undef $guard1;
+undef $guard2;
+undef $server;
+
 done_testing();

t/50too-much-data.t

@@ -62,5 +62,8 @@ foreach my $iter ((1, 10, 100)) {
         }
     }
 }
-done_testing();
 
+undef $upstream;
+undef $server;
+
+done_testing();

t/50too-much-headers.t

@@ -68,5 +68,8 @@ foreach my $iter ((1, 10, 100)) {
         }
     }
 }
-done_testing();
 
+undef $upstream;
+undef $server;
+
+done_testing();

t/80http1-chunk-overhead.t

@@ -65,4 +65,7 @@ sub send_request {
     $resp;
 }
 
+undef $upstream;
+undef $server;
+
 done_testing();

t/80reverse-proxy-truncated-chunked.t

@@ -91,4 +91,6 @@ subtest "HTTP/2" => sub {
 };
 
 $socket->close();
+undef $server;
+
 done_testing();