https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68451
Bug ID: 68451
Summary: internal compiler error: Segmentation fault when using
decltype with friend inside a class template
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: tim.pavlic at minelab dot com.au
Target Milestone: ---
Source to reproduce:
----
struct A {};
struct B
{
A a;
friend decltype(a); // This works, B is not a class template
};
template <typename T>
struct C
{
A a;
// This friend declaration gives an ICE.
// Seemingly because C is a class template
friend decltype(a);
};
int main()
{
B b;
C<int> c; // This causes the ICE
}
----
I have the above source in a single file, ice.cpp, and compile with: g++
-std=c++14 ice.cpp
Looks like using decltype in conjunction with friend has problems when you are
in a class template.
It also crashes on GCC 5 (not sure of minor number).
-std=c++11 has the same issue.
