src: initialize fields accessed by AsyncHooks before AsyncHooks

Author: jkrems

src/env.h

@@ -1015,6 +1015,9 @@ class Environment : public MemoryRetainer {
   uv_async_t task_queues_async_;
   int64_t task_queues_async_refs_ = 0;
 
+  std::atomic_bool is_stopping_ { false };
+  std::atomic_bool can_call_into_js_ { true };
+
   AsyncHooks async_hooks_;
   ImmediateInfo immediate_info_;
   AliasedInt32Array timeout_info_;
@@ -1092,7 +1095,6 @@ class Environment : public MemoryRetainer {
 
   bool has_serialized_options_ = false;
 
-  std::atomic_bool can_call_into_js_ { true };
   uint64_t flags_;
   uint64_t thread_id_;
   std::unordered_set<worker::Worker*> sub_worker_contexts_;
@@ -1150,8 +1152,6 @@ class Environment : public MemoryRetainer {
   CleanupQueue cleanup_queue_;
   bool started_cleanup_ = false;
 
-  std::atomic_bool is_stopping_ { false };
-
   std::unordered_set<int> unmanaged_fds_;
 
   std::function<void(Environment*, ExitCode)> process_exit_handler_{