Bad instanciation path
>Submitter-Id: net
>Originator: Franck Branjonneau
>Organization:
>Confidential: no
>Synopsis: Bad instanciation path dependending of the template argument
>Severity: serious
>Priority: medium
>Category: ice-on-legal-code rejects-legal
>Class:
>Release: 3.3.4
>Environment:
System: Linux
host: i486-pc-linux-gnu
build: i486-pc-linux-gnu
target: i486-pc-linux-gnu
>Description:
Bad instanciation path dependending of the template argument.
>How-To-Repeat:
g++-3.4 compiles the following code:
#include <iterator>
#include <vector>
template< unsigned _k >
struct I {};
template< unsigned _k >
struct C {
typedef I< _k > I;
struct S {};
};
template< unsigned _k >
struct A;
template< unsigned _k >
struct S {
typedef A< _k > A;
typedef typename A::IS IS;
template< int, unsigned _dummy= _k >
struct Foo;
template< typename _Iterator >
inline _Iterator
foo(
_Iterator target) const;
typename A::IS s1_; // # 1
typename C< _k >::S s2_; // # 2
};
template< unsigned _k >
struct A {
typedef C< _k > C;
typedef typename C::S IS;
};
template< unsigned _k >
template< unsigned _dummy >
struct S< _k >::Foo< 0, _dummy > {
typedef S< _k > S;
template< typename _Iterator >
_Iterator
operator()(
_Iterator target) const;
};
template< unsigned _k >
template< unsigned _dummy >
template< typename _Iterator >
_Iterator
S< _k >::Foo< 0, _dummy >::operator()(
_Iterator target) const {
return target;
}
template< unsigned _k >
template< typename _Iterator >
inline _Iterator
S< _k >::foo(
_Iterator target) const {
return Foo< 0 >().template operator()(target);
}
int
main(
int argc,
char * argv[]) {
S< 0 > s;
s.foo(0);
std::vector< int > v;
// s.foo(std::back_inserter(v)); // # 3
}
But, if I uncomment #3, g++ gives `S<_k>::s1_' has incomplete type on #2 an seg fault on #3.
>Fix:
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