diff --git a/src-server/ll/core/Statistics.cpp b/src-server/ll/core/Statistics.cpp
index ed738d35c1..ef7f4396d8 100644
--- a/src-server/ll/core/Statistics.cpp
+++ b/src-server/ll/core/Statistics.cpp
@@ -105,14 +105,13 @@ struct Statistics::Impl {
     nlohmann::json json;
 
     void submitData() {
-        auto charts = [](auto& self) -> coro::CoroTask<> {
+        coro::keepThis([&]() -> coro::CoroTask<> {
             nlohmann::json pluginInfo;
             pluginInfo["pluginName"]   = getSelfModIns()->getName();
             pluginInfo["customCharts"] = getCustomCharts();
-            self.json["plugins"].emplace_back(pluginInfo);
+            json["plugins"].emplace_back(pluginInfo);
             co_return;
-        }(*this);
-        charts.syncLaunch(thread::ServerThreadExecutor::getDefault());
+        }).syncLaunch(thread::ServerThreadExecutor::getDefault());
         try {
             auto body = json.dump();
             cpr::Post(
@@ -156,17 +155,16 @@ struct Statistics::Impl {
         json["osVersion"] = "";
         json["coreCount"] = std::thread::hardware_concurrency();
 
-        auto submit = [](auto& self) -> coro::CoroTask<> {
+        coro::keepThis([&]() -> coro::CoroTask<> {
             co_await (1.0min * random_utils::rand(3.0, 6.0));
-            self.submitData();
+            submitData();
             co_await (1.0min * random_utils::rand(1.0, 30.0));
-            self.submitData();
+            submitData();
             while (true) {
                 co_await 30min;
-                self.submitData();
+                submitData();
             }
-        }(*this);
-        submit.launch(thread::ThreadPoolExecutor::getDefault());
+        }).launch(thread::ThreadPoolExecutor::getDefault());
         getLogger().info("Statistics has been enabled, you can disable statistics in configuration file"_tr());
     }
 };
diff --git a/src/ll/api/coro/Collect.h b/src/ll/api/coro/Collect.h
index 2fe7fc9a8f..e02ec59de2 100644
--- a/src/ll/api/coro/Collect.h
+++ b/src/ll/api/coro/Collect.h
@@ -9,16 +9,16 @@ namespace ll::coro {
 template <class Container>
 struct CollectAllAwaiter {
 public:
-    using ExpectedT = typename Container::value_type::ExpectedT;
+    using ExpectedResult = typename Container::value_type::ExpectedResult;
 
     using allocator_type =
-        typename std::allocator_traits<typename Container::allocator_type>::template rebind_alloc<ExpectedT>;
+        typename std::allocator_traits<typename Container::allocator_type>::template rebind_alloc<ExpectedResult>;
 
 private:
-    std::coroutine_handle<>                handle;
-    Container                              tasks;
-    std::vector<ExpectedT, allocator_type> results;
-    std::atomic_size_t                     counter;
+    std::coroutine_handle<>                     handle;
+    Container                                   tasks;
+    std::vector<ExpectedResult, allocator_type> results;
+    std::atomic_size_t                          counter;
 
 public:
     CollectAllAwaiter(const CollectAllAwaiter&)            = delete;
@@ -56,7 +56,7 @@ template <template <class> class T, class... Ts>
 class CollectAllTupleAwaiter {
 public:
     using Input  = std::tuple<T<Ts>...>;
-    using Result = std::tuple<typename T<Ts>::ExpectedT...>;
+    using Result = std::tuple<typename T<Ts>::ExpectedResult...>;
 
 private:
     std::coroutine_handle<> handle;
@@ -92,7 +92,7 @@ class CollectAllTupleAwaiter {
                 }(std::get<I>(tasks), std::get<I>(results)),
                 ...
             );
-        }(std::make_index_sequence<sizeof...(Ts)>());
+        }(std::index_sequence_for<Ts...>());
     }
 
     constexpr auto await_resume() { return std::move(results); }
diff --git a/src/ll/api/coro/CoroPromise.h b/src/ll/api/coro/CoroPromise.h
index e67fd2c67d..92b18cf807 100644
--- a/src/ll/api/coro/CoroPromise.h
+++ b/src/ll/api/coro/CoroPromise.h
@@ -54,9 +54,9 @@ struct CoroPromiseBase {
 };
 template <class T>
 struct CoroPromise : public CoroPromiseBase {
-    using ExpectedT = std::conditional_t<concepts::IsLeviExpected<T>, T, Expected<T>>;
+    using ExpectedResult = std::conditional_t<concepts::IsLeviExpected<T>, T, Expected<T>>;
 
-    ExpectedT result{};
+    ExpectedResult result{};
 
     constexpr CoroPromise() noexcept = default;
 
@@ -64,8 +64,8 @@ struct CoroPromise : public CoroPromiseBase {
     void return_value(V&& value) noexcept(std::is_nothrow_constructible_v<T, V>)
         requires(std::is_constructible_v<T, V>)
     {
-        if constexpr (std::is_same_v<T, ExpectedT>) {
-            result = T{std::forward<V>(value)};
+        if constexpr (std::is_same_v<T, ExpectedResult>) {
+            result = std::forward<V>(value);
         } else {
             result.emplace(std::forward<V>(value));
         }
@@ -76,9 +76,9 @@ struct CoroPromise : public CoroPromiseBase {
 };
 template <>
 struct CoroPromise<void> : public CoroPromiseBase {
-    using ExpectedT = Expected<>;
+    using ExpectedResult = Expected<>;
 
-    ExpectedT result{std::in_place};
+    ExpectedResult result{std::in_place};
 
     constexpr CoroPromise() noexcept = default;
 
diff --git a/src/ll/api/coro/CoroTask.cpp b/src/ll/api/coro/CoroTask.cpp
deleted file mode 100644
index db547174ff..0000000000
--- a/src/ll/api/coro/CoroTask.cpp
+++ /dev/null
@@ -1 +0,0 @@
-#include "ll/api/coro/CoroTask.h"
diff --git a/src/ll/api/coro/CoroTask.h b/src/ll/api/coro/CoroTask.h
index c9111aa97a..bba14e8b5d 100644
--- a/src/ll/api/coro/CoroTask.h
+++ b/src/ll/api/coro/CoroTask.h
@@ -14,7 +14,9 @@ class CoroTask {
     using promise_type = CoroPromise<T>;
     using Handle       = std::coroutine_handle<promise_type>;
 
-    using ExpectedT = typename CoroPromise<T>::ExpectedT;
+    using Result = T;
+
+    using ExpectedResult = typename CoroPromise<T>::ExpectedResult;
 
     friend promise_type;
 
@@ -28,13 +30,13 @@ class CoroTask {
 public:
     struct ExpectedAwaiter : public WaiterBase {
         constexpr ExpectedAwaiter(Handle h) : WaiterBase(h) {}
-        constexpr ExpectedT await_resume() noexcept { return WaiterBase::getResult(); };
+        constexpr ExpectedResult await_resume() noexcept { return WaiterBase::getResult(); };
     };
 
     struct ValueAwaiter : public WaiterBase {
         constexpr ValueAwaiter(Handle h) : WaiterBase(h) {}
         constexpr T await_resume() {
-            if constexpr (std::is_same_v<T, ExpectedT>) {
+            if constexpr (std::is_same_v<T, ExpectedResult>) {
                 return WaiterBase::getResult();
             } else {
                 return WaiterBase::getResult().value();
@@ -65,7 +67,7 @@ class CoroTask {
 
     template <class F>
     void launch(NonNullExecutorRef executor, F&& callback)
-        requires(std::is_invocable_v<F, ExpectedT>)
+        requires(std::is_invocable_v<F, ExpectedResult>)
     {
         setExecutor(executor);
         struct Launcher {
@@ -85,11 +87,11 @@ class CoroTask {
     void launch(NonNullExecutorRef executor) {
         launch(executor, [](auto&&) {});
     }
-    ExpectedT syncLaunch(NonNullExecutorRef executor) noexcept {
-        ExpectedT value;
+    ExpectedResult syncLaunch(NonNullExecutorRef executor) noexcept {
+        ExpectedResult value;
         try {
             std::binary_semaphore cond{0};
-            launch(executor, [&](ExpectedT&& result) {
+            launch(executor, [&](ExpectedResult&& result) {
                 value = std::move(result);
                 cond.release();
             });
@@ -118,4 +120,10 @@ inline auto collectAll(CoroTask<Ts>... tasks)
 {
     return CollectAllTupleAwaiter<CoroTask, Ts...>(std::move(tasks)...);
 }
+template <class F, class... Args>
+    requires(traits::is_specialization_of_v<std::invoke_result_t<F, Args...>, CoroTask>)
+auto keepThis(F&& f, Args&&... args) noexcept -> std::invoke_result_t<F, Args...> {
+    co_return co_await std::invoke(std::forward<F>(f), std::forward<Args>(args)...);
+}
+
 } // namespace ll::coro
diff --git a/src/ll/api/coro/CoroTaskWaiter.h b/src/ll/api/coro/CoroTaskWaiter.h
index 98e9bb696c..b14742652c 100644
--- a/src/ll/api/coro/CoroTaskWaiter.h
+++ b/src/ll/api/coro/CoroTaskWaiter.h
@@ -7,7 +7,7 @@ template <typename T>
 struct CoroTaskWaiter {
     using Handle = std::coroutine_handle<CoroPromise<T>>;
 
-    using ExpectedT = typename CoroPromise<T>::ExpectedT;
+    using ExpectedResult = typename CoroPromise<T>::ExpectedResult;
 
     Handle handle;
 
@@ -38,8 +38,8 @@ struct CoroTaskWaiter {
         promise.exec->execute(handle);
     }
 
-    constexpr ExpectedT getResult() noexcept {
-        ExpectedT ret = std::move(handle.promise().result);
+    constexpr ExpectedResult getResult() noexcept {
+        ExpectedResult ret = std::move(handle.promise().result);
         std::exchange(handle, nullptr).destroy();
         return ret;
     }
diff --git a/src/ll/api/coro/Executor.cpp b/src/ll/api/coro/Executor.cpp
index 31e4be4723..6a27feaaf5 100644
--- a/src/ll/api/coro/Executor.cpp
+++ b/src/ll/api/coro/Executor.cpp
@@ -1,4 +1,5 @@
 #include "ll/api/coro/Executor.h"
+#include "ll/api/coro/CoroTask.h"
 
 namespace ll::coro {