1// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin -g -emit-llvm -o - | FileCheck %s
2// This test is for a crash when emitting debug info for not-yet-completed
3// types.
4// Test that we don't actually emit a forward decl for the offending class:
5// CHECK:  [ DW_TAG_structure_type ] [Derived<int>] {{.*}} [def]
6// rdar://problem/15931354
7template <class A> class Derived;
8
9template <class A> class Base {
10  static Derived<A> *create();
11};
12
13template <class A> struct Derived : Base<A> {
14};
15
16Base<int> *f;
17
18// During the instantiation of Derived<int>, Base<int> becomes required to be
19// complete - since the declaration has already been emitted (due to 'f',
20// above), we immediately try to build debug info for Base<int> which then
21// requires the (incomplete definition) of Derived<int> which is problematic.
22//
23// (if 'f' is not present, the point at which Base<int> becomes required to be
24// complete during the instantiation of Derived<int> is a no-op because
25// Base<int> was never emitted so we ignore it and carry on until we
26// wire up the base class of Derived<int> in the debug info later on)
27Derived<int> d;
28