[Bug c++/50864] SFINAE bug

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50864

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2011-10-25
     Ever Confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-10-25 14:25:23 UTC ---
Apparently this has essentially to do with namespaces, TREE_CODE (code) is
NAMESPACE_DECL when tsubst_copy ICEs.

The testcase is a bit garbled (ie, cannot possibly compile anyway) - missing
std::declval, mpl::true_, mpl::false_, is_arrow_dereferencable - but
interestingly if all the missing bits are provided in the global namespace, no
ICE.