What will happen to bitcoins stored at segwit outputs pre-BCH-fork?
According to BIP 141, talking about the Bitcoin chain, it'd still trigger "Witness program" and the funds would be stored safely in the SegWit address -after the fork.

Talking about the Bitcoin Cash chain, the miners can redeem SegWit outputs, (both Bitcoin Cash sent to SegWit addresses and Bitcoins in SegWit addresses pre-hardfork.) However those addresses need to have exposed their Witness program, or the outputs can't be redeemed.