I just finished soldering a QFN package to a breakout board, and was about to go at it with my multimeter in continuity testing mode to check for bridges, when it occurred to me that some semiconductors can be damaged by negative voltages. I presume that continuity testing works by applying a small voltage, in line with a large resistor, and checking for a voltage drop... could that small voltage damage the IC? I only have the one multimeter so I can't exactly check what voltage it feeds in, but I assume it's large enough to get through your average diode's forward drop.
I'm probably just being paranoid, but it would be nice to get a categorical answer to put my mind at ease. Is the voltage applied by a run-of-the-mill DMM in continuity mode ever enough to risk damaging an unpowered digital IC?