https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65760
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Wed Apr 29 16:07:47 2015 New Revision: 222581 URL: https://gcc.gnu.org/viewcvs?rev=222581&root=gcc&view=rev Log: PR libstdc++/65760 * include/std/functional (__check_func_return_type): Use is_same to avoid using _is_convertible on incomplete types. * testsuite/20_util/function/65760.cc: New. Added: trunk/libstdc++-v3/testsuite/20_util/function/65760.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/std/functional