Move sink.close to finally block.

Author: isoos

app/lib/package/backend.dart

@@ -1824,8 +1824,9 @@ Future _saveTarballToFS(Stream<List<int>> data, String filename) async {
   if (await targetFile.exists()) {
     await targetFile.delete();
   }
+  late IOSink sink;
   try {
-    final sink = targetFile.openWrite();
+    sink = targetFile.openWrite();
     int receivedBytes = 0;
     await for (final chunk in data) {
       receivedBytes += chunk.length;
@@ -1838,10 +1839,11 @@ Future _saveTarballToFS(Stream<List<int>> data, String filename) async {
       }
     }
     await sink.flush();
-    await sink.close();
   } catch (e, st) {
     _logger.warning('An error occurred while streaming tarball to FS.', e, st);
     rethrow;
+  } finally {
+    await sink.close();
   }
   _logger.info('Finished streaming tarball to FS (elapsed: ${sw.elapsed}).');
 }