---Thread-Announcement------------------------------------------

Thread #x is the program's root thread

----------------------------------------------------------------

Thread #x unlocked a not-locked lock at 0x........
   at 0x........: pthread_rwlock_unlock_WRK (hg_intercepts.c:...)
   by 0x........: pthread_rwlock_unlock (hg_intercepts.c:...)
   ...
   by 0x........: main (tc12_rwl_trivial.c:29)
 Lock at 0x........ was first observed
   at 0x........: pthread_rwlock_init (hg_intercepts.c:...)
   ...
   by 0x........: main (tc12_rwl_trivial.c:18)
 Address 0x........ is on thread #x's stack
 in frame #x, created by main (tc12_rwl_trivial.c:14)


----------------------------------------------------------------

Thread #x's call to pthread_rwlock_unlock failed
   with error code 1 (EPERM: Operation not permitted)
   at 0x........: pthread_rwlock_unlock_WRK (hg_intercepts.c:...)
   by 0x........: pthread_rwlock_unlock (hg_intercepts.c:...)
   ...
   by 0x........: main (tc12_rwl_trivial.c:29)


ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)