Don't dereference a null pointer

If we don't specifiy an output for R.java, don't try to write
data to the class definition

Change-Id: I3ad471ec93dcb8baf13f221174065679cce311ad
Fixes: 72547268
Test: out/host/linux-x86/nativetest64/aapt2_tests/aapt2_tests

2 files changed, 21 insertions, 2 deletions

diff --git a/tools/aapt2/java/JavaClassGenerator.cpp b/tools/aapt2/java/JavaClassGenerator.cpp
index 6b07b1e96261..db1561e17f16 100644
--- a/tools/aapt2/java/JavaClassGenerator.cpp
+++ b/tools/aapt2/java/JavaClassGenerator.cpp
@@ -347,7 +347,9 @@ void JavaClassGenerator::ProcessStyleable(const ResourceNameRef& name, const Res
   }
 
   // Add the Styleable array to the Styleable class.
-  out_class_def->AddMember(std::move(array_def));
+  if (out_class_def != nullptr) {
+    out_class_def->AddMember(std::move(array_def));
+  }
 
   // Now we emit the indices into the array.
   for (size_t i = 0; i < attr_count; i++) {
@@ -578,7 +580,6 @@ bool JavaClassGenerator::Generate(const StringPiece& package_name_to_generate,
   if (out_r_txt != nullptr) {
     r_txt_printer = util::make_unique<Printer>(out_r_txt);
   }
-
   // Generate an onResourcesLoaded() callback if requested.
   if (out != nullptr && options_.rewrite_callback_options) {
     rewrite_method =
diff --git a/tools/aapt2/java/JavaClassGenerator_test.cpp b/tools/aapt2/java/JavaClassGenerator_test.cpp
index e449546f9399..10a97d84f59d 100644
--- a/tools/aapt2/java/JavaClassGenerator_test.cpp
+++ b/tools/aapt2/java/JavaClassGenerator_test.cpp
@@ -438,4 +438,22 @@ TEST(JavaClassGeneratorTest, GenerateOnResourcesLoadedCallbackForSharedLibrary)
   EXPECT_THAT(output, HasSubstr("com.boo.R.onResourcesLoaded"));
 }
 
+TEST(JavaClassGeneratorTest, OnlyGenerateRText) {
+  std::unique_ptr<ResourceTable> table =
+      test::ResourceTableBuilder()
+          .SetPackageId("android", 0x01)
+          .AddValue("android:attr/foo", ResourceId(0x01010000), util::make_unique<Attribute>())
+          .AddValue("android:styleable/hey.dude", ResourceId(0x01020000),
+                    test::StyleableBuilder()
+                        .AddItem("android:attr/foo", ResourceId(0x01010000))
+                        .Build())
+          .Build();
+
+  std::unique_ptr<IAaptContext> context =
+      test::ContextBuilder().SetPackageId(0x01).SetCompilationPackage("android").Build();
+  JavaClassGenerator generator(context.get(), table.get(), {});
+
+  ASSERT_TRUE(generator.Generate("android", nullptr));
+}
+
 }  // namespace aapt