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From: "flast at flast dot jp" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/49823] New: [C++0x] ICE on decltype(expr)::type with template
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49823

           Summary: [C++0x] ICE on decltype(expr)::type with template
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: flast@flast.jp


All of following three template functions occur ICE with GCC 4.7.0 20110723.

----8<----
template < typename T >
auto f( const T &x )
  -> typename decltype( x )::type; // ICE on here

template < typename T >
typename decltype( T{} )::type // ICE on here
f( T );

template < typename T >
void f( T x )
{ typename decltype( x )::type x; } // ICE on here
----8<----