fn mutex_get_id<'tcx>(
ecx: &mut MiriInterpCx<'tcx>,
mutex_op: &OpTy<'tcx, Provenance>
) -> InterpResult<'tcx, MutexId>fn mutex_get_id<'tcx>(
ecx: &mut MiriInterpCx<'tcx>,
mutex_op: &OpTy<'tcx, Provenance>
) -> InterpResult<'tcx, MutexId>