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 dir

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cd dir

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echo bleh > bar

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hg add bar

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hg ci -m 'add bar'

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hg cp bar foo

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echo >> bar

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hg ci -m 'cp bar foo; change bar'

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hg debugrename foo

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hg debugindex .hg/store/data/bar.i