[Bug c++/11150] New: [3.3/3.4 Regression] No code generated with explicit template instantiation

["pinskia at physics dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11150

           Summary: [3.3/3.4 Regression] No code generated with explicit
                    template instantiation
           Product: gcc
           Version: 3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: pinskia@physics.uc.edu
                CC: gcc-bugs@gcc.gnu.org
OtherBugsDependingO 11148
             nThis:

Compile the following code:
template <typename X>
class Foo {
    int i;
public:
    Foo() {
        X::explode();
    }
};

class Bar {
    Foo<int> foo_;
public:
    Bar() {}
};

template class Foo<int>;
and see that Foo<int>::Foo<int>() is not generated.
It used to generate code under 3.2.3.  This is from bug 11148 which I split up.