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copies: filter out copies when target is not in destination manifest...

copies: filter out copies when target is not in destination manifest When chaining a series of commits that copied a file with a series that removed the destination file, we would still include the copy in the result. Similar to the previous patch, I have checked that `hg status --copies` is not affected by this bug, but I wouldn't be surprised if some commands are. Differential Revision: https://phab.mercurial-scm.org/D5989

Matt Mackall - - Load All Authors

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      https://bz.mercurial-scm.org/619

        $ hg init

        $ echo a > a

        $ hg ci -Ama

        adding a

        $ echo b > b

        $ hg branch b

        marked working directory as branch b

        (branches are permanent and global, did you want a bookmark?)

        $ hg ci -Amb

        adding b

        $ hg co -C 0

        0 files updated, 0 files merged, 1 files removed, 0 files unresolved

      Fast-forward:

        $ hg merge b

        1 files updated, 0 files merged, 0 files removed, 0 files unresolved

        (branch merge, don't forget to commit)

        $ hg ci -Ammerge

      Bogus fast-forward should fail:

        $ hg merge b

        abort: merging with a working directory ancestor has no effect

        [255]

      Even with strange revset (issue4465)

        $ hg merge ::.

        abort: merging with a working directory ancestor has no effect

        [255]

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				https://bz.mercurial-scm.org/619

				$ hg init
				$ echo a > a
				$ hg ci -Ama
				adding a

				$ echo b > b
				$ hg branch b
				marked working directory as branch b
				(branches are permanent and global, did you want a bookmark?)
				$ hg ci -Amb
				adding b

				$ hg co -C 0
				0 files updated, 0 files merged, 1 files removed, 0 files unresolved

				Fast-forward:

				$ hg merge b
				1 files updated, 0 files merged, 0 files removed, 0 files unresolved
				(branch merge, don't forget to commit)
				$ hg ci -Ammerge

				Bogus fast-forward should fail:

				$ hg merge b
				abort: merging with a working directory ancestor has no effect
				[255]

				Even with strange revset (issue4465)

				$ hg merge ::.
				abort: merging with a working directory ancestor has no effect
				[255]