Reproduce synthetic context failure
Change-Id: I6cf0de2fc27396e219b10212c0d317d74b226512
diff --git a/src/test/java/com/android/tools/r8/classmerging/vertical/MergeSynthesizingContextIntoSyntheticLambdaTest.java b/src/test/java/com/android/tools/r8/classmerging/vertical/MergeSynthesizingContextIntoSyntheticLambdaTest.java
new file mode 100644
index 0000000..069d4f7
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/classmerging/vertical/MergeSynthesizingContextIntoSyntheticLambdaTest.java
@@ -0,0 +1,78 @@
+// Copyright (c) 2021, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package com.android.tools.r8.classmerging.vertical;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import com.android.tools.r8.utils.codeinspector.AssertUtils;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+
+@RunWith(Parameterized.class)
+public class MergeSynthesizingContextIntoSyntheticLambdaTest extends TestBase {
+
+ private final TestParameters parameters;
+
+ @Parameterized.Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ public MergeSynthesizingContextIntoSyntheticLambdaTest(TestParameters parameters) {
+ this.parameters = parameters;
+ }
+
+ @Test
+ public void test() throws Exception {
+ AssertUtils.assertFailsCompilationIf(
+ parameters.isDexRuntime(),
+ () -> {
+ testForR8(parameters.getBackend())
+ .addInnerClasses(getClass())
+ .addKeepMainRule(Main.class)
+ // Disable inlining to ensure that the synthetic lambdas remain in the residual
+ // program.
+ .addOptionsModification(options -> options.enableInlining = false)
+ .addVerticallyMergedClassesInspector(
+ inspector -> {
+ if (parameters.isCfRuntime()) {
+ inspector.assertNoClassesMerged();
+ } else {
+ inspector.assertMergedIntoSubtype(I.class);
+ }
+ })
+ .setMinApi(parameters.getApiLevel())
+ .compile()
+ .run(parameters.getRuntime(), Main.class)
+ .assertSuccessWithOutputLines("I", "J");
+ });
+ }
+
+ static class Main {
+ public static void main(String[] args) {
+ I i = () -> System.out.println("I");
+ i.f();
+ i.g().h();
+ }
+ }
+
+ interface I {
+
+ void f();
+
+ default J g() {
+ // Has synthesizing context I. After vertical class merging, this synthesizing context is
+ // rewritten into the synthetic lambda defined in main().
+ return () -> System.out.println("J");
+ }
+ }
+
+ interface J {
+
+ void h();
+ }
+}
