[Bug c++/27527] invalid types produced out of argument deduction (SFINAE bug)

[jason at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27527

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #6 from Jason Merrill <jason at gcc dot gnu.org> 2011-09-28 19:26:19 UTC ---
14.9.2/8:

Only invalid types and expressions in the immediate context of the function
type and its template parameter types can result in a deduction failure. [
Note: The evaluation of the substituted types and expressions can result in
side effects such as the instantiation of class template specializations and/or
function template specializations, the generation of implicitly-defined
functions, etc. Such side effects are not in the “immediate context” and can
result in the program being ill-formed. — end note ]