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localrepo: handle ValueError during repository opening...

localrepo: handle ValueError during repository opening Python 3.8 can raise ValueError on attempt of an I/O operation against an illegal path. This was causing test-remotefilelog-gc.t to fail on Python 3.8. This commit teaches repository opening to handle ValueError and re-raise an Abort on failure. An arguably better solution would be to implement this logic in the vfs layer. But that seems like a bag of worms and I don't want to go down that rabbit hole. Until users report uncaught ValueError exceptions in the wild, I think it is fine to patch this at the only occurrence our test harness is finding it. Differential Revision: https://phab.mercurial-scm.org/D7944

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]