Index: pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/generators.dart |
diff --git a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/generators.dart b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/generators.dart |
index 99d3b3f27f2a21c5a4539f2b5767fc55be30a8dd..63c2e11c3f149a5628032f851c7f87795a2c339b 100644 |
--- a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/generators.dart |
+++ b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/generators.dart |
@@ -62,7 +62,7 @@ async_(gen, T, @rest args) => JS( |
let result = FutureT.microtask(function() { |
iter = $gen.apply(null, $args)[Symbol.iterator](); |
var result = onValue(); |
- if ($strongInstanceOf(result, FutureT) == null) { |
+ if ($isSubtype($getReifiedType(result), FutureT) == null) { |
// Chain the Future<dynamic> to a Future<T> to produce the correct |
// final type. |
return result.then($T)((x) => x, {onError: onError}); |