At 17:44 of the second period in the Penguins/Bruins game, Boston requested a Coach's Challenge to review whether Sidney Crosby interfered with goaltender Anton Khudobin before the puck entered the net.

After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed no goaltender interference infractions occurred.
Therefore the original call stands - good goal Pittsburgh Penguins.
Since the Coach's Challenge did not result in the original call being overturned, the Bruins forfeit their time-out.