Index: runtime/src/kmp_runtime.c =================================================================== --- runtime/src/kmp_runtime.c +++ runtime/src/kmp_runtime.c @@ -777,8 +777,10 @@ single block */ /* TODO: Should this be acquire or release? */ - status = KMP_COMPARE_AND_STORE_ACQ32(&team->t.t_construct, old_this, - th->th.th_local.this_construct); + if (team->t.t_construct == old_this) { + status = KMP_COMPARE_AND_STORE_ACQ32(&team->t.t_construct, old_this, + th->th.th_local.this_construct); + } #if USE_ITT_BUILD if ( __itt_metadata_add_ptr && __kmp_forkjoin_frames_mode == 3 && KMP_MASTER_GTID(gtid) && #if OMP_40_ENABLED