diff --git a/src/main/java/com/android/tools/r8/Version.java b/src/main/java/com/android/tools/r8/Version.java
index 59fc527..2e7a4ab 100644
--- a/src/main/java/com/android/tools/r8/Version.java
+++ b/src/main/java/com/android/tools/r8/Version.java
@@ -11,7 +11,7 @@
 
   // This field is accessed from release scripts using simple pattern matching.
   // Therefore, changing this field could break our release scripts.
-  public static final String LABEL = "1.5.63";
+  public static final String LABEL = "1.5.64";
 
   private Version() {
   }
diff --git a/src/main/java/com/android/tools/r8/cf/LoadStoreHelper.java b/src/main/java/com/android/tools/r8/cf/LoadStoreHelper.java
index 91f0193..bd48153 100644
--- a/src/main/java/com/android/tools/r8/cf/LoadStoreHelper.java
+++ b/src/main/java/com/android/tools/r8/cf/LoadStoreHelper.java
@@ -168,6 +168,9 @@
   }
 
   public void storeOutValue(Instruction instruction, InstructionListIterator it) {
+    if (!instruction.hasOutValue()) {
+      return;
+    }
     assert !(instruction.outValue() instanceof StackValue);
     if (instruction.isConstInstruction()) {
       ConstInstruction constInstruction = instruction.asConstInstruction();
diff --git a/src/test/java/com/android/tools/r8/cf/UnusedMultiNewArrayTest.java b/src/test/java/com/android/tools/r8/cf/UnusedMultiNewArrayTest.java
new file mode 100644
index 0000000..5b9ad45
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/cf/UnusedMultiNewArrayTest.java
@@ -0,0 +1,48 @@
+// Copyright (c) 2019, 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.cf;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+/** Regression test for b/138668220. */
+@RunWith(Parameterized.class)
+public class UnusedMultiNewArrayTest extends TestBase {
+
+  private final TestParameters parameters;
+
+  @Parameters(name = "{0}")
+  public static TestParametersCollection data() {
+    return getTestParameters().withAllRuntimes().build();
+  }
+
+  public UnusedMultiNewArrayTest(TestParameters parameters) {
+    this.parameters = parameters;
+  }
+
+  @Test
+  public void test() throws Exception {
+    testForR8(parameters.getBackend())
+        .addProgramClasses(TestClass.class)
+        .addKeepMainRule(TestClass.class)
+        .setMinApi(parameters.getRuntime())
+        .compile();
+  }
+
+  static class TestClass {
+
+    public static void main(String[] args) {
+      // This instruction cannot be removed because A is not provided as a program class.
+      A[][] unused = new A[42][42];
+    }
+  }
+
+  static class A {}
+}