D2593: state: add logic to parse the state file in old way if cbor fails

[pulkit (Pulkit Goyal)]

pulkit added inline comments.

INLINE COMMENTS

> durin42 wrote in state.py:86
> Ugh. Yeah, maybe see if they'd take a patch upstream to raise a more explicit exception type.

@durin42 I feel sorry about adding a TODO but I did that because I won't be able to work for a week or so dur to laptop issue. If you are not okay with that, I am fine with these lying here.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2593

To: pulkit, #hg-reviewers
Cc: durin42, mercurial-devel