https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63587
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Here's another smaller example:
% cat test.ii
template <class> struct A
{
};
template <typename> struct B
{
template <typename> struct C;
};
class D;
template <typename> class F;
struct G
{
void operator()(const D &, D);
};
class D
{
public:
D (int);
};
struct H
{
H (int);
};
template <typename _Key, typename, typename, typename _Compare, typename>
class I
{
typedef _Key key_type;
template <typename _Key_compare> struct J
{
_Key_compare _M_key_compare;
};
J<_Compare> _M_impl;
public:
A<int> _M_get_insert_unique_pos (const key_type &);
A<int> _M_get_insert_hint_unique_pos (H &);
template <typename... _Args> int _M_emplace_hint_unique (H, _Args &&...);
};
template <typename _Key, typename _Tp, typename _Compare = G,
typename _Alloc = F<A<_Tp> > >
class K
{
typedef _Key key_type;
typedef _Key value_type;
typedef typename B<_Alloc>::template C<value_type> _Pair_alloc_type;
I<key_type, value_type, int, _Compare, _Pair_alloc_type> _M_t;
public:
void operator[](key_type) { _M_t._M_emplace_hint_unique (0); }
};
template <typename _Key, typename _Val, typename _KeyOfValue,
typename _Compare, typename _Alloc>
A<int>
I<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_unique_pos (
const key_type &p1)
{
_M_impl._M_key_compare (p1, 0);
}
template <typename _Key, typename _Val, typename _KeyOfValue,
typename _Compare, typename _Alloc>
A<int>
I<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_get_insert_hint_unique_pos (
H &)
{
_M_get_insert_unique_pos (0);
}
template <typename _Key, typename _Val, typename _KeyOfValue,
typename _Compare, typename _Alloc>
template <typename... _Args>
int
I<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::_M_emplace_hint_unique (
H p1, _Args &&...)
{
_M_get_insert_hint_unique_pos (p1);
}
namespace
{
struct L;
}
void
fn1 ()
{
K<D, L> a;
a[0];
K<D, int> b;
b[0];
}
% g++ -c -O2 -std=c++11 -fno-strict-aliasing test.ii
test.ii: In function ‘void fn1()’:
test.ii:64:28: internal compiler error: tree check: expected var_decl, have
result_decl in add_local_variables, at tree-inline.c:4112
