Fix order of output of references with invokeMethodRef.

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 802d838f316090e5ff4299854dc46efed117f735..0d1a0e389f19cabfd50693a0a9da6c9424d3906e 100644
--- a/pkg/analyzer/test/src/summary/summary_common.dart
+++ b/pkg/analyzer/test/src/summary/summary_common.dart
@@ -6904,6 +6904,29 @@ final v = p.C.m();
     ]);
   }
 
+  test_expr_invokeMethodRef_with_reference_arg() {
+    if (skipNonConstInitializers) {
+      return;
+    }
+    UnlinkedVariable variable = serializeVariableText('''
+f(x) => null;
+final u = null;
+final v = f(u);
+''');
+    _assertUnlinkedConst(variable.constExpr, isValidConst: false, operators: [
+      UnlinkedConstOperation.pushReference,
+      UnlinkedConstOperation.invokeMethodRef
+    ], ints: [
+      0,
+      1
+    ], referenceValidators: [
+      (EntityRef r) => checkTypeRef(r, null, null, 'u',
+          expectedKind: ReferenceKind.topLevelPropertyAccessor),
+      (EntityRef r) => checkTypeRef(r, null, null, 'f',
+          expectedKind: ReferenceKind.topLevelFunction)
+    ]);
+  }
+
   test_expr_throwException() {
     if (skipNonConstInitializers) {
       return;