Coinbase finds ETC double spend hack

Based on research conducted on January 5, Coinbase has found a flaw in the Ethereum Classic (ETC) blockchain. The flaw features a double spend loophole.
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Via a tweet today, Coinbase warned customers of the double spend problem and have halted ETC blockchain transactions for customer protection.On 1/5/2019, Coinbase detected a deep chain reorganization of the Ethereum Classic blockchain that included a double spend. In order to protect customer funds, we immediately paused movements of the