Blockchain: cancel pop_blocks() operation on interrupt #10192
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On SIGINT, `Blockchain::cancel()` is called, which sets `m_cancel` to `true`. This commit stops attempting to pop blocks from the chain once that flag is set. This should leave the blockchain in a well-define state, even if the `pop_blocks()` operation itself did not "complete".
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On SIGINT,
Blockchain::cancel()is called, which setsm_canceltotrue. This commit stops attempting to pop blocks from the chain once that flag is set. This should leave the blockchain in a well-defined state, even if thepop_blocks()operation itself did not "complete".