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

[durin42 (Augie Fackler)]

durin42 added inline comments.

INLINE COMMENTS

> pulkit wrote in state.py:84
> I am not confident about this part. Like to have some suggestions here.

Probably treat not-a-dict as corrupt and fall back to the other format?

> pulkit wrote in state.py:86
> Should I change thirdparty/cbor/ to raise specific errors?

Ugh. Yeah, maybe see if they'd take a patch upstream to raise a more explicit exception type.

REPOSITORY
  rHG Mercurial

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

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