allow null in compute for weak mode (flutter#63515)

mingwandroid · Sep 6, 2020 · 093f169 · 093f169
1 parent 165372e
commit 093f169
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/flutter/lib/src/foundation/_isolates_io.dart b/packages/flutter/lib/src/foundation/_isolates_io.dart
@@ -50,7 +50,7 @@ Future<R> compute<Q, R>(isolates.ComputeCallback<Q, R> callback, Q message, { St
     }
   });
   resultPort.listen((dynamic resultData) {
-    assert(resultData is R);
+    assert(resultData == null || resultData is R);
     if (!result.isCompleted)
       result.complete(resultData as R);
   });