Test checking that no PSI is built for synthetic classes produced by compiler

idea/testData/libraries/internalClasses/InternalClasses.kt

@@ -0,0 +1,31 @@
+package test
+
+trait T {
+    fun foo() {
+    }
+
+    fun boo()
+}
+
+trait TT : T {
+}
+
+fun f() {
+    var i = 0
+    val myLocalFun = {
+        ++i
+    }
+
+    class MyLocalClass {
+    }
+}
+
+class A {
+    class B {
+        class C {
+        }
+    }
+
+    inner class C {
+    }
+}