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 7 template <class A> class Derived; 8 9 template <class A> class Base { 10 static Derived<A> *create(); 11 }; 12 13 template <class A> struct Derived : Base<A> { 14 }; 15 16 Base<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) 27 Derived<int> d; 28