fix: by forcing to compile empty code block

Author: Vipul-Cariappa

lib/CppInterOp/CppInterOp.cpp

@@ -2499,6 +2499,16 @@ int get_wrapper_code(compat::Interpreter& I, const FunctionDecl* FD,
     S.InstantiateFunctionDefinition(SourceLocation(), FDmod,
                                     /*Recursive=*/true,
                                     /*DefinitionRequired=*/true);
+#ifndef CPPINTEROP_USE_CLING
+    // TODO: Will need to replace this with a RAII for clang-repl too
+    auto GeneratedPTU = I.Parse("");
+    if (!GeneratedPTU)
+      llvm::logAllUnhandledErrors(
+          GeneratedPTU.takeError(), llvm::errs(),
+          "[MakeFunctionCallable -> InstantiateFunctionDefinition] Failed to "
+          "generate PTU:");
+#endif
+
     if (!FD->isDefined(Definition)) {
       llvm::errs() << "TClingCallFunc::make_wrapper"
                    << ":"

unittests/CppInterOp/FunctionReflectionTest.cpp

@@ -2195,6 +2195,12 @@ TEST(FunctionReflectionTest, UndoTest) {
 }
 
 TEST(FunctionReflectionTest, FailingTest1) {
+#ifdef _WIN32
+  GTEST_SKIP() << "Disabled on Windows. Needs fixing.";
+#endif
+#ifdef EMSCRIPTEN
+  GTEST_SKIP() << "Test fails for Emscipten builds";
+#endif
   Cpp::CreateInterpreter();
   EXPECT_FALSE(Cpp::Declare(R"(
     class WithOutEqualOp1 {};
@@ -2217,7 +2223,6 @@ TEST(FunctionReflectionTest, FailingTest1) {
   EXPECT_TRUE(fn);
   Cpp::JitCall jit_call = Cpp::MakeFunctionCallable(fn);
   EXPECT_EQ(jit_call.getKind(), Cpp::JitCall::kUnknown); // expected to fail
-  EXPECT_FALSE(Cpp::Declare("int x = 1;")); // expected to pass, but fails
-  EXPECT_FALSE(Cpp::Declare(
-      "int y = 1;")); // expected to pass, and passes on second attempt
+  EXPECT_FALSE(Cpp::Declare("int x = 1;"));
+  EXPECT_FALSE(Cpp::Declare("int y = x;"));
 }