diff --git a/source/MaaToolkit/API/MaaToolkitDevice.cpp b/source/MaaToolkit/API/MaaToolkitDevice.cpp
index 564f49a2b..e7f9a2ca1 100644
--- a/source/MaaToolkit/API/MaaToolkitDevice.cpp
+++ b/source/MaaToolkit/API/MaaToolkitDevice.cpp
@@ -61,7 +61,11 @@ MaaSize MaaToolkitWaitForFindDeviceToComplete()
 
 MaaSize MaaToolkitGetDeviceCount()
 {
-    return device_mgr.get_devices().value_or(std::vector<Device> {}).size();
+    auto devices = device_mgr.get_devices();
+    if (!devices) {
+        return 0;
+    }
+    return devices->size();
 }
 
 MaaStringView MaaToolkitGetDeviceName(MaaSize index)
diff --git a/source/MaaToolkit/AdbDevice/DeviceMgr.cpp b/source/MaaToolkit/AdbDevice/DeviceMgr.cpp
index 581d5f325..7768bf09a 100644
--- a/source/MaaToolkit/AdbDevice/DeviceMgr.cpp
+++ b/source/MaaToolkit/AdbDevice/DeviceMgr.cpp
@@ -48,7 +48,6 @@ bool DeviceMgr::is_find_completed() const
     }
     
     if (!find_device_future_.valid()) {
-        LogError << "find_device_future_ is not running";
         return false;
     }
 
diff --git a/source/MaaUtils/IOStream/ChildPipeIOStream.cpp b/source/MaaUtils/IOStream/ChildPipeIOStream.cpp
index 006798b33..49a4e1d0f 100644
--- a/source/MaaUtils/IOStream/ChildPipeIOStream.cpp
+++ b/source/MaaUtils/IOStream/ChildPipeIOStream.cpp
@@ -10,11 +10,11 @@ struct prevent_inherit : boost::process::extend::handler
     template <typename Char, typename Sequence>
     void on_setup(boost::process::extend::windows_executor<Char, Sequence>& exec)
     {
-        SIZE_T size;
+        SIZE_T size = 0;
         InitializeProcThreadAttributeList(NULL, 1, 0, &size);
         auto attrlist = reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(HeapAlloc(GetProcessHeap(), 0, size));
         InitializeProcThreadAttributeList(attrlist, 1, 0, &size);
-        HANDLE empty[1];
+        HANDLE empty[1] = {};
         UpdateProcThreadAttribute(attrlist, 0, PROC_THREAD_ATTRIBUTE_HANDLE_LIST, empty, 0, NULL, NULL);
         exec.startup_info_ex.lpAttributeList = attrlist;
     }