D1658: memfilectx: make changectx argument mandatory in constructor

[durin42 (Augie Fackler)]

durin42 requested changes to this revision.
durin42 added a comment.
This revision now requires changes to proceed.


  This seems to break test-rebase-inmemory.t - could you take a look?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1658

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