Patchwork [1,of,8] py3: use unicode literals in encoding.py

# HG changeset patch
# User Pulkit Goyal <7895pulkit@gmail.com>
# Date 1470161385 -19800
#      Tue Aug 02 23:39:45 2016 +0530
# Node ID c03543a126719097a1a61c8e5ef5fcb222262315
# Parent  73ff159923c1f05899c27238409ca398342d9ae0
py3: use unicode literals in encoding.py

The custom module loader adds a b'' everywhere and hence making everything bytes. There are some instances
where we need to have unicodes. This patch deals with such instances in encoding.py. Moreover this patch also
updates the output of test-check-py3-compat.t at some places which was left unchanged.

This series of patches is work of Gregory Szorc and are taken from https://hg.mozilla.org/users/gszorc_mozilla.com/hg/shortlog/py3.

Kindly ignore this series, I tried hg push
https://selenic.com/repo/hg-push -r some_changest, and the whole
series got pushed :(

On Mon, Aug 8, 2016 at 1:24 AM, Pulkit Goyal <7895pulkit@gmail.com> wrote:
> # HG changeset patch
> # User Pulkit Goyal <7895pulkit@gmail.com>
> # Date 1470161385 -19800
> #      Tue Aug 02 23:39:45 2016 +0530
> # Node ID c03543a126719097a1a61c8e5ef5fcb222262315
> # Parent  73ff159923c1f05899c27238409ca398342d9ae0
> py3: use unicode literals in encoding.py
>
> The custom module loader adds a b'' everywhere and hence making everything bytes. There are some instances
> where we need to have unicodes. This patch deals with such instances in encoding.py. Moreover this patch also
> updates the output of test-check-py3-compat.t at some places which was left unchanged.
>
> This series of patches is work of Gregory Szorc and are taken from https://hg.mozilla.org/users/gszorc_mozilla.com/hg/shortlog/py3.
>
> diff --git a/mercurial/encoding.py b/mercurial/encoding.py
> --- a/mercurial/encoding.py
> +++ b/mercurial/encoding.py
> @@ -70,20 +70,20 @@
>      return result
>
>  _encodingfixers = {
> -    '646': lambda: 'ascii',
> -    'ANSI_X3.4-1968': lambda: 'ascii',
> -    'mac-roman': _getpreferredencoding
> +    u'646': lambda: u'ascii',
> +    u'ANSI_X3.4-1968': lambda: u'ascii',
> +    u'mac-roman': _getpreferredencoding
>  }
>
>  try:
> -    encoding = os.environ.get("HGENCODING")
> +    encoding = os.environ.get(u"HGENCODING")
>      if not encoding:
> -        encoding = locale.getpreferredencoding() or 'ascii'
> +        encoding = locale.getpreferredencoding() or u'ascii'
>          encoding = _encodingfixers.get(encoding, lambda: encoding)()
>  except locale.Error:
> -    encoding = 'ascii'
> -encodingmode = os.environ.get("HGENCODINGMODE", "strict")
> -fallbackencoding = 'ISO-8859-1'
> +    encoding = u'ascii'
> +encodingmode = os.environ.get(u"HGENCODINGMODE", u"strict")
> +fallbackencoding = u'ISO-8859-1'
>
>  class localstr(str):
>      '''This class allows strings that are unmodified to be
> @@ -180,8 +180,8 @@
>          raise error.Abort(k, hint="please check your locale settings")
>
>  # How to treat ambiguous-width characters. Set to 'wide' to treat as wide.
> -wide = (os.environ.get("HGENCODINGAMBIGUOUS", "narrow") == "wide"
> -        and "WFA" or "WF")
> +wide = (os.environ.get(u"HGENCODINGAMBIGUOUS", u"narrow") == u"wide"
> +        and u"WFA" or u"WF")
>
>  def colwidth(s):
>      "Find the column width of a string for display in the local encoding"
> diff --git a/tests/test-check-py3-compat.t b/tests/test-check-py3-compat.t
> --- a/tests/test-check-py3-compat.t
> +++ b/tests/test-check-py3-compat.t
> @@ -15,90 +15,90 @@
>  #if py3exe
>    $ hg files 'set:(**.py)' | sed 's|\\|/|g' | xargs $PYTHON3 contrib/check-py3-compat.py
>    doc/hgmanpage.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
> -  hgext/acl.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/automv.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/blackbox.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/bugzilla.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/censor.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/chgserver.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/children.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/churn.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/clonebundles.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  hgext/acl.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/automv.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/blackbox.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/bugzilla.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/censor.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/chgserver.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/children.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/churn.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/clonebundles.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    hgext/color.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
> -  hgext/convert/bzr.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/common.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/convcmd.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/cvs.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/cvsps.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/darcs.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/filemap.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/git.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/gnuarch.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/hg.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/monotone.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/p4.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/convert/subversion.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  hgext/convert/bzr.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/common.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/convcmd.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/cvs.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/cvsps.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/darcs.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/filemap.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/git.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/gnuarch.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/hg.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/monotone.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/p4.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/convert/subversion.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    hgext/convert/transport.py: error importing module: <ImportError> No module named 'svn.client' (line *) (glob)
> -  hgext/eol.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/extdiff.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/factotum.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/fetch.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/fsmonitor/state.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/fsmonitor/watchmanclient.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/gpg.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/graphlog.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/hgk.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/highlight/highlight.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/histedit.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/journal.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/keyword.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/basestore.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/lfcommands.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/lfutil.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/localstore.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/overrides.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/proto.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/remotestore.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/reposetup.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/storefactory.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/largefiles/uisetup.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  hgext/eol.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/extdiff.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/factotum.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/fetch.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/fsmonitor/state.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/fsmonitor/watchmanclient.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/gpg.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/graphlog.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/hgk.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/highlight/highlight.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/histedit.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/journal.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/keyword.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/basestore.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/lfcommands.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/lfutil.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/localstore.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/overrides.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/proto.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/remotestore.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/reposetup.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/storefactory.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/largefiles/uisetup.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    hgext/largefiles/wirestore.py: error importing module: <SystemError> Parent module 'hgext.largefiles' not loaded, cannot perform relative import (line *) (glob)
> -  hgext/mq.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/notify.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/pager.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/patchbomb.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/purge.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/rebase.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/record.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/relink.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/schemes.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/share.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/shelve.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/strip.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/transplant.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/win32mbcs.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  hgext/win32text.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  hgext/mq.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/notify.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/pager.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/patchbomb.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/purge.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/rebase.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/record.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/relink.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/schemes.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/share.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/shelve.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/strip.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/transplant.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/win32mbcs.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  hgext/win32text.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    mercurial/archival.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
> -  mercurial/bookmarks.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/branchmap.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  mercurial/bookmarks.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/branchmap.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    mercurial/bundle2.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
> -  mercurial/bundlerepo.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/byterange.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/changegroup.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/changelog.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/cmdutil.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  mercurial/bundlerepo.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/byterange.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/changegroup.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/changelog.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/cmdutil.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    mercurial/commands.py: invalid syntax: invalid syntax (<unknown>, line *) (glob)
> -  mercurial/commandserver.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/config.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/context.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/copies.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/crecord.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/dagparser.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/dagutil.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/destutil.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/dirstate.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/discovery.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> -  mercurial/dispatch.py: error importing: <TypeError> str expected, not bytes (error at encoding.py:*) (glob)
> +  mercurial/commandserver.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/config.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/context.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/copies.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/crecord.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/dagparser.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/dagutil.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/destutil.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/dirstate.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/discovery.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> +  mercurial/dispatch.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    mercurial/exchange.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    mercurial/extensions.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
>    mercurial/fancyopts.py: error importing: <TypeError> str expected, not bytes (error at i18n.py:*) (glob)
> @@ -136,8 +136,9 @@
>    mercurial/patch.py: error importing: <TypeError> '_fields_' must be a sequence of (name, C type) pairs (error at osutil.py:*) (glob)
>    mercurial/pathutil.py: error importing: <TypeError> '_fields_' must be a sequence of (name, C type) pairs (error at osutil.py:*) (glob)
>    mercurial/peer.py: error importing: <TypeError> '_fields_' must be a sequence of (name, C type) pairs (error at osutil.py:*) (glob)
> -  mercurial/pure/mpatch.py: error importing module: <AttributeError> 'VendorImporter' object has no attribute 'find_spec' (line *) (glob)
> -  mercurial/pure/parsers.py: error importing module: <AttributeError> 'VendorImporter' object has no attribute 'find_spec' (line *) (glob)
> +  mercurial/pure/mpatch.py: error importing module: <ImportError> cannot import name 'pycompat' (line *) (glob)
> +  mercurial/pure/osutil.py: error importing module: <ImportError> cannot import name 'policy' (line *) (glob)
> +  mercurial/pure/parsers.py: error importing module: <ImportError> No module named 'mercurial.pure.node' (line *) (glob)
>    mercurial/pushkey.py: error importing: <TypeError> '_fields_' must be a sequence of (name, C type) pairs (error at osutil.py:*) (glob)
>    mercurial/pvec.py: error importing: <TypeError> '_fields_' must be a sequence of (name, C type) pairs (error at osutil.py:*) (glob)
>    mercurial/registrar.py: error importing: <TypeError> '_fields_' must be a sequence of (name, C type) pairs (error at osutil.py:*) (glob)
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