fix: reorder shard field order to solve crash upon stop (#358)

Author: thweetkomputer

include/storage/shard.h

@@ -4,6 +4,7 @@
 #include <boost/context/protected_fixedsize_stack.hpp>
 #include <cstdio>
 #include <ctime>
+#include <memory>
 #include <utility>  // NOLINT(build/include_order)
 
 #include "circular_queue.h"
@@ -192,14 +193,14 @@ class Shard
     moodycamel::BlockingConcurrentQueue<KvRequest *> requests_;
     std::thread thd_;
     PagesPool page_pool_;
-    std::unique_ptr<AsyncIoManager> io_mgr_;
-    IndexPageManager index_mgr_;
     TaskManager task_mgr_;
 #ifndef NDEBUG
     boost::context::protected_fixedsize_stack stack_allocator_;
 #else
     boost::context::pooled_fixedsize_stack stack_allocator_;
 #endif
+    std::unique_ptr<AsyncIoManager> io_mgr_;
+    IndexPageManager index_mgr_;
 
     class PendingWriteQueue
     {

src/storage/shard.cpp

@@ -45,10 +45,10 @@ Shard::Shard(const EloqStore *store, size_t shard_id, uint32_t fd_limit)
     : store_(store),
       shard_id_(shard_id),
       page_pool_(&store->options_),
-      io_mgr_(AsyncIoManager::Instance(store, fd_limit)),
-      index_mgr_(io_mgr_.get()),
       task_mgr_(&store->options_),
-      stack_allocator_(store->options_.coroutine_stack_size)
+      stack_allocator_(store->options_.coroutine_stack_size),
+      io_mgr_(AsyncIoManager::Instance(store, fd_limit)),
+      index_mgr_(io_mgr_.get())
 {
     const auto &opts = store_->options_;
     oss_enabled_ = !opts.store_path.empty() && !opts.cloud_store_path.empty();