Apple's Clang 5.1 still has that bug...

/Users/Paul/Desktop/assert-test.cpp:3:1: error: implicit instantiation of undefined template '__static_assert_test<false>'
static_assert(std::is_trivially_copyable<volatile int>::value, "wtf");
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/__config:490:35: note: expanded from macro 'static_assert'
    typedef __static_assert_check<sizeof(__static_assert_test<(__b)>)> \
                                  ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/c++/v1/__config:486:24: note: template is declared here
template <bool> struct __static_assert_test;
                       ^
1 error generated.