del transaction before lock before wlock This way rollbacks happen while the repo is still locked. Deleting lock before wlock is not strictly necessary, but is more consistent with the locking order.

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#!/bin/sh

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hg init

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echo "Is there an error message when trying to diff non-existing files?"

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hg diff not found

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echo "Is there an error message when trying to add non-existing files?"

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hg add not found