diff --git a/next/kmp/app/desktopApp/src/desktopMain/kotlin/main.kt b/next/kmp/app/desktopApp/src/desktopMain/kotlin/main.kt
index 1682dcda6f..34b6537923 100644
--- a/next/kmp/app/desktopApp/src/desktopMain/kotlin/main.kt
+++ b/next/kmp/app/desktopApp/src/desktopMain/kotlin/main.kt
@@ -1,6 +1,7 @@
 import kotlinx.coroutines.async
 import org.dweb_browser.helper.WARNING
 import org.dweb_browser.helper.globalDefaultScope
+import org.dweb_browser.helper.ioAsyncExceptionHandler
 import org.dweb_browser.helper.platform.PureViewController
 import kotlin.system.exitProcess
 
@@ -25,24 +26,24 @@ suspend fun main(vararg args: String) {
     return
   }
 
-try {
-  val dnsNMMDeferred = globalDefaultScope.async {
-    // 等待“应用”准备完毕
-    PureViewController.awaitPrepared()
-    // 启动内核
-    startDwebBrowser(
-      System.getenv("debug") ?: System.getProperty("debug"),
-      listOf() //ExtMM(TrayNMM(), true)
-    )
-  }
-  // 启动“应用”
-  PureViewController.startApplication()
+  try {
+    val dnsNMMDeferred = globalDefaultScope.async(ioAsyncExceptionHandler) {
+      // 等待“应用”准备完毕
+      PureViewController.awaitPrepared()
+      // 启动内核
+      startDwebBrowser(
+        System.getenv("debug") ?: System.getProperty("debug"),
+        listOf() //ExtMM(TrayNMM(), true)
+      )
+    }
+    // 启动“应用”
+    PureViewController.startApplication()
 
-  dnsNMMDeferred.await().runtimeOrNull?.shutdown()
-} catch (e:Exception) {
-  WARNING("global catch error : $e")
-  e.printStackTrace()
-} finally {
-  exitProcess(0)
-}
+    dnsNMMDeferred.await().runtimeOrNull?.shutdown()
+  } catch (e: Exception) {
+    WARNING("global catch error : $e")
+    e.printStackTrace()
+  } finally {
+    exitProcess(0)
+  }
 }
\ No newline at end of file
diff --git a/next/kmp/dwebview/src/commonMain/kotlin/org/dweb_browser/dwebview/DWebView.kt b/next/kmp/dwebview/src/commonMain/kotlin/org/dweb_browser/dwebview/DWebView.kt
index e131537a7e..9552c308a7 100644
--- a/next/kmp/dwebview/src/commonMain/kotlin/org/dweb_browser/dwebview/DWebView.kt
+++ b/next/kmp/dwebview/src/commonMain/kotlin/org/dweb_browser/dwebview/DWebView.kt
@@ -24,6 +24,7 @@ import org.dweb_browser.core.ipc.helper.IWebMessagePort
 import org.dweb_browser.core.module.MicroModule
 import org.dweb_browser.helper.Bounds
 import org.dweb_browser.helper.Debugger
+import org.dweb_browser.helper.Once
 import org.dweb_browser.helper.RememberLazy
 import org.dweb_browser.helper.Signal
 import org.dweb_browser.helper.SimpleSignal
@@ -248,9 +249,9 @@ class DestroyStateSignal(val scope: CoroutineScope) {
     private set
   private var _destroySignal = SimpleSignal();
   val onDestroy = _destroySignal.toListener()
-  fun doDestroy(): Boolean {
+  fun doDestroy() = Once {
     if (isDestroyed) {
-      return false
+      return@Once false
     }
     debugDWebView("DESTROY")
     isDestroyed = true
@@ -259,6 +260,6 @@ class DestroyStateSignal(val scope: CoroutineScope) {
       delay(2000)
       coroutineContext.cancel(CancellationException("destroy"))
     }
-    return true
-  }
+    return@Once true
+  }.invoke()
 }
\ No newline at end of file
diff --git a/next/kmp/helper/ui/src/commonMain/kotlin.link b/next/kmp/helper/ui/src/commonMain/kotlin.link
deleted file mode 120000
index fec5f55f22..0000000000
--- a/next/kmp/helper/ui/src/commonMain/kotlin.link
+++ /dev/null
@@ -1 +0,0 @@
-../../../src/commonMain/kotlin
\ No newline at end of file