Ignore invalid file URIs from LSP (#6000)

helix-term/src/application.rs

@@ -703,7 +703,13 @@ impl Application {
                         }
                     }
                     Notification::PublishDiagnostics(mut params) => {
-                        let path = params.uri.to_file_path().unwrap();
+                        let path = match params.uri.to_file_path() {
+                            Ok(path) => path,
+                            Err(_) => {
+                                log::error!("Unsupported file URI: {}", params.uri);
+                                return;
+                            }
+                        };
                         let doc = self.editor.document_by_path_mut(&path);
 
                         if let Some(doc) = doc {