The following testcase with invalid virtual inheritance ICEs since GCC 4.0.0:
==================================
struct A
{
virtual ~A() {}
};
struct B : A, virtual A {};
struct C : A, B {};
C c;
==================================
bug.cc:6: error: duplicate base type 'A' invalid
bug.cc:8: warning: direct base 'A' inaccessible in 'C' due to ambiguity
bug.cc: In destructor 'virtual C::~C()':
bug.cc:8: internal compiler error: Segmentation fault
Please submit a full bug report, [etc.]
A more reduced version crashes since GCC 4.1.0:
==================================
struct A {};
struct B : A, virtual A {};
struct C : B {};
==================================
bug.cc:7: error: duplicate base type 'A' invalid
bug.cc:9: internal compiler error: Segmentation fault
Please submit a full bug report, [etc.]
--
Summary: [4.0/4.1/4.2 Regression] ICE with invalid virtual
inheritance
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code, error-recovery, monitored
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: reichelt at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27952
