[CP] fix the memleak of nested Array

deps/oblib/src/lib/utility/utility.h

@@ -1057,15 +1057,23 @@ inline void set_member_allocator(T &dest, common::ObIAllocator *alloc)
 template <typename T>
 inline int construct_assign_wrap(T &dest, const T &src, TrueType)
 {
+  int ret = OB_SUCCESS;
   new(&dest) T();
-  return dest.assign(src);
+  if (OB_FAIL(dest.assign(src))) {
+    dest.~T();
+  }
+  return ret;
 }
 
 template <typename T>
 inline int construct_assign_wrap(T &dest, const T &src, FalseType)
 {
+  int ret = OB_SUCCESS;
   new(&dest) T(src);
-  return get_copy_assign_ret_wrap(dest, BoolType<HAS_MEMBER(T, get_copy_assign_ret)>());
+  if (OB_FAIL(get_copy_assign_ret_wrap(dest, BoolType<HAS_MEMBER(T, get_copy_assign_ret)>()))) {
+    dest.~T();
+  }
+  return ret;
 }
 
 // This function is used for copy assignment

deps/oblib/unittest/lib/utility/test_utility.cpp

@@ -18,6 +18,32 @@
 using namespace oceanbase::common;
 using namespace std;
 
+struct TestItem
+{
+  TestItem() : status_(0), disable_assign_(false)
+  {}
+  ~TestItem()
+  {
+    status_ = 1;
+  }
+  int assign(const TestItem &other)
+  {
+    return other.disable_assign_ ? OB_ERROR : OB_SUCCESS;
+  }
+  int status_;
+  bool disable_assign_;
+};
+
+TEST(utility, construct_assign)
+{
+  TestItem item_1, item_2;
+  item_1.disable_assign_ = true;
+  TestItem *item = (TestItem *)ob_malloc(sizeof(TestItem), "TEST");
+  construct_assign(*item, item_1);
+  ASSERT_EQ(1, item->status_);
+  construct_assign(*item, item_2);
+  ASSERT_EQ(0, item->status_);
+}
 
 TEST(utility, load_file_to_string)
 {