[Bug libstdc++/67294] New: FAIL: 30_threads/*timed_mutex/unlock/2.cc (test for excess errors) on x86_64-apple-darwin14

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67294

            Bug ID: 67294
           Summary: FAIL: 30_threads/*timed_mutex/unlock/2.cc (test for
                    excess errors) on x86_64-apple-darwin14
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dominiq at lps dot ens.fr
                CC: iains at gcc dot gnu.org, redi at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-apple-darwin14
            Target: x86_64-apple-darwin14
             Build: x86_64-apple-darwin14

On x86_64-apple-darwin14 I see the following failures

FAIL: 30_threads/recursive_timed_mutex/unlock/2.cc (test for excess errors)
UNRESOLVED: 30_threads/recursive_timed_mutex/unlock/2.cc compilation failed to
produce executable
FAIL: 30_threads/timed_mutex/unlock/2.cc (test for excess errors)
UNRESOLVED: 30_threads/timed_mutex/unlock/2.cc compilation failed to produce
executable

The tests have been introduced at revision r226863 and the failures are

/opt/gcc/work/libstdc++-v3/testsuite/30_threads/recursive_timed_mutex/unlock/2.cc:28:25:
error: 'recursive_timed_mutex' in namespace 'std' does not name a type
 using mutex_type = std::recursive_timed_mutex;
                         ^
/opt/gcc/work/libstdc++-v3/testsuite/30_threads/recursive_timed_mutex/unlock/2.cc:30:1:
error: 'mutex_type' does not name a type
 mutex_type m;
 ^
/opt/gcc/work/libstdc++-v3/testsuite/30_threads/recursive_timed_mutex/unlock/2.cc:
In function 'void f()':
/opt/gcc/work/libstdc++-v3/testsuite/30_threads/recursive_timed_mutex/unlock/2.cc:34:19:
error: 'mutex_type' was not declared in this scope
   std::lock_guard<mutex_type> l(m);
                   ^
/opt/gcc/work/libstdc++-v3/testsuite/30_threads/recursive_timed_mutex/unlock/2.cc:34:29:
error: template argument 1 is invalid
   std::lock_guard<mutex_type> l(m);
                             ^
/opt/gcc/work/libstdc++-v3/testsuite/30_threads/recursive_timed_mutex/unlock/2.cc:34:33:
error: 'm' was not declared in this scope
   std::lock_guard<mutex_type> l(m);
                                 ^