Enable arena test (it was previously #ifdef'd away accidentally)
PiperOrigin-RevId: 519782179
diff --git a/BUILD b/BUILD
index 9c3aed7..1294b60 100644
--- a/BUILD
+++ b/BUILD
@@ -830,6 +830,7 @@
name = "arena_test",
srcs = ["upb/mem/arena_test.cc"],
deps = [
+ ":port",
":upb",
"@com_google_absl//absl/random",
"@com_google_absl//absl/random:distributions",
diff --git a/upb/mem/arena_test.cc b/upb/mem/arena_test.cc
index 8355d7b..b091997 100644
--- a/upb/mem/arena_test.cc
+++ b/upb/mem/arena_test.cc
@@ -12,6 +12,9 @@
#include "absl/synchronization/notification.h"
#include "upb/upb.hpp"
+// Must be last.
+#include "upb/port/def.inc"
+
namespace {
static void decrement_int(void* ptr) {