[Bug c++/58527] Failures when a function parameter pack is not final

[nmm1 at cam dot ac.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58527

--- Comment #2 from Nick Maclaren <nmm1 at cam dot ac.uk> ---
Thanks.  I can't use your fix, because I am trying to write a generic
multi-dimensional array class for possible inclusion in the standard,
and demanding such usages from end users is Not On.  There are other
possibilities, of course.

I would be interested in a reference to the wording in the standard,
if you know it offhand.  I failed to find it.

But that doesn't address the other point.  Even if C++ allows a parameter
pack in a position where it cannot be deduced (and that would not be at
all surprising), good practice would be to give at least a warning.  And
I did specify -Wall -Wextra :-)