Inner classes of generic classes can't extend Throwable

Do it in the same way as Java: prohibit inner classes (including
anonymous inner classes) capturing type parameters from outer classes
(but not outer methods) extending Throwable.

See KT-17981:
- Deprecated in 1.2
- Error in 1.3

compiler/testData/diagnostics/tests/controlStructures/catchInnerClassesOfGenerics.kt

@@ -0,0 +1,40 @@
+// !LANGUAGE: +ProhibitInnerClassesOfGenericClassExtendingThrowable
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+class OuterGeneric<T> {
+    inner <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class ErrorInnerExn<!> : Exception()
+
+    inner class InnerA {
+        inner <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class ErrorInnerExn2<!> : Exception()
+    }
+
+    class OkNestedExn : Exception()
+
+    val errorAnonymousObjectExn = <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>object<!> : Exception() {}
+
+    fun foo() {
+        <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class OkLocalExn<!> : Exception()
+
+        val errorAnonymousObjectExn = <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>object<!> : Exception() {}
+    }
+
+    fun <X> genericFoo() {
+        <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class OkLocalExn<!> : Exception()
+
+        class LocalGeneric<Y> {
+            inner <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class ErrorInnerExnOfLocalGeneric<!> : Exception()
+        }
+    }
+}
+
+class Outer {
+    inner class InnerGeneric<T> {
+        inner <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class ErrorInnerExn<!> : Exception()
+    }
+}
+
+fun <T> genericFoo() {
+    <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>class ErrorLocalExnInGenericFun<!> : Exception()
+
+    val errorkAnonymousObjectExnInGenericFun = <!INNER_CLASS_OF_GENERIC_THROWABLE_SUBCLASS!>object<!> : Exception() {}
+}