Fix portability issues and move JVM-only test

lynglib/src/jvmTest/kotlin/BytecodeRecentOpsJvmTest.kt

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2026 Sergey S. Chernov real.sergeych@gmail.com
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+import kotlinx.coroutines.test.runTest
+import net.sergeych.lyng.Compiler
+import net.sergeych.lyng.Script
+import net.sergeych.lyng.toSource
+import net.sergeych.lyng.bytecode.CmdDisassembler
+import net.sergeych.lyng.bytecode.CmdFunction
+import kotlin.test.Test
+import kotlin.test.assertNotNull
+import kotlin.test.assertTrue
+
+class BytecodeRecentOpsJvmTest {
+
+    @Test
+    fun moduleDeclsAvoidCallableCallSlots() = runTest {
+        val script = """
+            class A {}
+            fun f() { 1 }
+            enum E { one }
+        """.trimIndent()
+        val compiled = Compiler.compile(script.toSource(), Script.defaultImportManager)
+        val field = Script::class.java.getDeclaredField("moduleBytecode")
+        field.isAccessible = true
+        val moduleFn = field.get(compiled) as? CmdFunction
+        assertNotNull(moduleFn, "module bytecode missing")
+        val disasm = CmdDisassembler.disassemble(moduleFn)
+        assertTrue(!disasm.contains("CALL_SLOT"), disasm)
+        assertTrue(!disasm.contains("Callable@"), disasm)
+        assertTrue(disasm.contains("DECL_CLASS"), disasm)
+        assertTrue(disasm.contains("DECL_FUNCTION"), disasm)
+        assertTrue(disasm.contains("DECL_ENUM"), disasm)
+    }
+}