Minor. Add tests

compiler/testData/codegen/box/inlineClasses/contextsAndAccessors/kt30780Generic.kt

@@ -0,0 +1,18 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Test<T: Int>(val x: T) {
+    private companion object {
+        private const val CONSTANT = "OK"
+    }
+
+    fun crash() = getInlineConstant()
+
+    private inline fun getInlineConstant(): String {
+        return CONSTANT
+    }
+}
+
+fun box() = Test(1).crash()