1 files changed, 19 insertions, 0 deletions
diff --git a/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp b/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp
index 5ee27b189e..1eedebfcca 100644
--- a/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp
+++ b/xfa/fxfa/fm2js/cxfa_fmparser_unittest.cpp
@@ -238,3 +238,22 @@ TEST(CXFA_FMParserTest, ParseBadElseIfExpression) {
   ASSERT_TRUE(ast == nullptr);
   EXPECT_TRUE(parser->HasError());
 }
+
+TEST(CXFA_FMParserTest, ParseDepthWithWideTree) {
+  const wchar_t input[] = {L"a <> b <> c <> d <> e <> f <> g <> h <> i <> j"};
+
+  {
+    auto parser = pdfium::MakeUnique<CXFA_FMParser>(input);
+    std::unique_ptr<CXFA_FMAST> ast = parser->Parse();
+    ASSERT_TRUE(ast);
+    EXPECT_TRUE(!parser->HasError());
+  }
+
+  {
+    auto parser = pdfium::MakeUnique<CXFA_FMParser>(input);
+    parser->SetMaxParseDepthForTest(5);
+    std::unique_ptr<CXFA_FMAST> ast = parser->Parse();
+    ASSERT_TRUE(ast == nullptr);
+    EXPECT_TRUE(parser->HasError());
+  }
+}