http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59872
--- Comment #4 from David Krauss <potswa at mac dot com> --- Created attachment 31884 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31884&action=edit SFINAE based fix This seems stylistically OK, but I did copy-paste the implementation of moving. Perhaps the common code should be factored into a new function, or the constructor should simply call into move assignment. It fixes the problem but I was unable to run the testsuite. This is a brand-new installation and I haven't used it for contribution yet. (It says "WARNING: could not find `runtest'".)
