infer null from context, this avoids bottom being introduced

pkg/analyzer/test/src/summary/summary_common.dart

Index: pkg/analyzer/test/src/summary/summary_common.dart
diff --git a/pkg/analyzer/test/src/summary/summary_common.dart b/pkg/analyzer/test/src/summary/summary_common.dart
index d3e94d34b9d12b3deb0c00839e69f165275d3629..2401ea865012303886fe9823a0ea1da7cfd45b88 100644
--- a/pkg/analyzer/test/src/summary/summary_common.dart
+++ b/pkg/analyzer/test/src/summary/summary_common.dart
@@ -8446,12 +8446,19 @@ var v = f(g: (x, y) {});
   }
 
   test_initializer_executable_with_bottom_return_type() {
-    // The synthetic executable for `v` has type `() => Bottom`.
     UnlinkedVariable variable = serializeVariableText('int v = null;');
     expect(variable.initializer.returnType, isNull);
-    checkInferredTypeSlot(
-        variable.initializer.inferredReturnTypeSlot, null, null, '*bottom*',
-        onlyInStrongMode: false);
+    if (strongMode) {
+      // Strong mode infers a type for the closure of `() => int`.
+      checkInferredTypeSlot(variable.initializer.inferredReturnTypeSlot,
+          'dart:core', 'dart:core', 'int',
+          onlyInStrongMode: false);
+    } else {
+      // In Dart1 mode the synthetic executable for `v` has type `() => Bottom`.
+      checkInferredTypeSlot(
+          variable.initializer.inferredReturnTypeSlot, null, null, '*bottom*',
+          onlyInStrongMode: false);
+    }
   }
 
   test_initializer_executable_with_imported_return_type() {