1*0a6a1f1dSLionel Sambuc // RUN: %clang_cc1 %s -triple=x86_64-apple-darwin -g -emit-llvm -o - | FileCheck %s 2*0a6a1f1dSLionel Sambuc // This test is for a crash when emitting debug info for not-yet-completed 3*0a6a1f1dSLionel Sambuc // types. 4*0a6a1f1dSLionel Sambuc // Test that we don't actually emit a forward decl for the offending class: 5*0a6a1f1dSLionel Sambuc // CHECK: [ DW_TAG_structure_type ] [Derived<int>] {{.*}} [def] 6*0a6a1f1dSLionel Sambuc // rdar://problem/15931354 7*0a6a1f1dSLionel Sambuc template <class A> class Derived; 8*0a6a1f1dSLionel Sambuc 9*0a6a1f1dSLionel Sambuc template <class A> class Base { 10*0a6a1f1dSLionel Sambuc static Derived<A> *create(); 11*0a6a1f1dSLionel Sambuc }; 12*0a6a1f1dSLionel Sambuc 13*0a6a1f1dSLionel Sambuc template <class A> struct Derived : Base<A> { 14*0a6a1f1dSLionel Sambuc }; 15*0a6a1f1dSLionel Sambuc 16*0a6a1f1dSLionel Sambuc Base<int> *f; 17*0a6a1f1dSLionel Sambuc 18*0a6a1f1dSLionel Sambuc // During the instantiation of Derived<int>, Base<int> becomes required to be 19*0a6a1f1dSLionel Sambuc // complete - since the declaration has already been emitted (due to 'f', 20*0a6a1f1dSLionel Sambuc // above), we immediately try to build debug info for Base<int> which then 21*0a6a1f1dSLionel Sambuc // requires the (incomplete definition) of Derived<int> which is problematic. 22*0a6a1f1dSLionel Sambuc // 23*0a6a1f1dSLionel Sambuc // (if 'f' is not present, the point at which Base<int> becomes required to be 24*0a6a1f1dSLionel Sambuc // complete during the instantiation of Derived<int> is a no-op because 25*0a6a1f1dSLionel Sambuc // Base<int> was never emitted so we ignore it and carry on until we 26*0a6a1f1dSLionel Sambuc // wire up the base class of Derived<int> in the debug info later on) 27*0a6a1f1dSLionel Sambuc Derived<int> d; 28