fix(core): clear State map on exit

Author: FabianLars

crates/tauri/src/app.rs

@@ -1037,6 +1037,7 @@ macro_rules! shared_app_impl {
         for (_, webview) in self.manager.webviews() {
           webview.resources_table().clear();
         }
+        unsafe { self.manager.state.clear() };
       }
 
       /// Gets the invoke key that must be referenced when using [`crate::webview::InvokeRequest`].

crates/tauri/src/state.rs

@@ -149,6 +149,13 @@ impl StateManager {
     Some(*value)
   }
 
+  /// SAFETY: This will cause all references obtained through [Self::try_get] to dangle.
+  /// This must only be called on app exit (in cleanup_before_exit).
+  pub(crate) unsafe fn clear(&self) {
+    let mut map = self.map.lock().unwrap();
+    map.clear();
+  }
+
   /// Gets the state associated with the specified type.
   pub fn get<T: Send + Sync + 'static>(&self) -> State<'_, T> {
     self