Reproduce NPE in vertical class merger in presence of missing classes
Bug: 191124967
Change-Id: I62d2c3e0089675cec0e03f5182e25b5d9dfd211d
diff --git a/src/test/java/com/android/tools/r8/classmerging/vertical/VerticalClassMergingWithMissingSuperClassTest.java b/src/test/java/com/android/tools/r8/classmerging/vertical/VerticalClassMergingWithMissingSuperClassTest.java
new file mode 100644
index 0000000..d7091fb
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/classmerging/vertical/VerticalClassMergingWithMissingSuperClassTest.java
@@ -0,0 +1,77 @@
+// 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 static org.junit.Assert.assertEquals;
+
+import com.android.tools.r8.NoVerticalClassMerging;
+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;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class VerticalClassMergingWithMissingSuperClassTest extends TestBase {
+
+ @Parameter public TestParameters parameters;
+
+ @Parameters(name = "{0}")
+ public static TestParametersCollection data() {
+ return getTestParameters().withAllRuntimesAndApiLevels().build();
+ }
+
+ @Test
+ public void test() throws Exception {
+ AssertUtils.assertFailsCompilation(
+ () ->
+ testForR8(parameters.getBackend())
+ .addProgramClasses(Main.class, A.class, B.class, C.class)
+ .addKeepMainRule(Main.class)
+ .addDontWarn(MissingClass.class)
+ .addVerticallyMergedClassesInspector(
+ inspector -> inspector.assertMergedIntoSubtype(B.class))
+ .enableNoVerticalClassMergingAnnotations()
+ .setMinApi(parameters.getApiLevel())
+ .compile()
+ .addRunClasspathFiles(buildOnDexRuntime(parameters, MissingClass.class))
+ .run(parameters.getRuntime(), Main.class)
+ .assertSuccessWithOutputLines("C", "A", "B"),
+ exception -> assertEquals(NullPointerException.class, exception.getCause().getClass()));
+ }
+
+ static class Main {
+ public static void main(String[] args) {
+ new C().m();
+ }
+ }
+
+ static class MissingClass {}
+
+ @NoVerticalClassMerging
+ static class A extends MissingClass {
+ void m() {
+ System.out.println("A");
+ }
+ }
+
+ static class B extends A {
+ @Override
+ void m() {
+ super.m();
+ System.out.println("B");
+ }
+ }
+
+ static class C extends B {
+ C() {
+ System.out.println("C");
+ }
+ }
+}