Not get supertypes of Nothing

(exception EA-37833)

compiler/testData/diagnostics/tests/incompleteCode/checkNothingIsSubtype.kt

@@ -0,0 +1,14 @@
+package d
+
+trait A<T>
+
+fun infer<T>(<!UNUSED_PARAMETER!>a<!>: A<T>) : T {<!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
+
+fun test(nothing: Nothing?) {
+    val <!UNUSED_VARIABLE!>i<!> = <!TYPE_INFERENCE_TYPE_CONSTRUCTOR_MISMATCH!>infer<!>(nothing)
+}
+
+fun sum(<!UNUSED_PARAMETER!>a<!> : IntArray) : Int {
+    for (<!UNREACHABLE_CODE!>n<!><!SYNTAX!><!>
+    <!ITERATOR_AMBIGUITY!>return <!TYPE_MISMATCH!>"?"<!><!><!SYNTAX!><!>
+<!SYNTAX!><!>}