Contributing to PyPy

Hi I am interested in contributing to PyPy. I tried to clone the source code repository using hg but saw errors. I then found this git repo: https://github.com/mozillazg/pypy. I was actually able to clone it successfully. Could someone still contribute to PyPy using git instead of hg?

If you are curious here are the errors I see when I try to clone the repository using hg:

hg clone https://foss.heptapod.net/pypy/pypy
destination directory: pypy
applying clone bundle from https://cellar-c2.services.clever-cloud.com/heptapod-foss-clonebundles/pypy/pypy-2020-02-12-13-12-optimized-zstd-v2.hg
adding changesets
adding manifests                                                                                                               
adding file changes                                                                                                             
transaction abort!
rollback completed
** unknown exception encountered, please report by visiting
** https://mercurial-scm.org/wiki/BugTracker
** Python 3.9.7 (default, Sep  3 2021, 04:31:11) [Clang 12.0.5 (clang-1205.0.22.9)]
** Mercurial Distributed SCM (version 5.9.1)
** Extensions loaded: 
Traceback (most recent call last):
  File "/opt/homebrew/bin/hg", line 61, in <module>
    dispatch.run()
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 144, in run
    status = dispatch(req)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 250, in dispatch
    status = _rundispatch(req)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 294, in _rundispatch
    ret = _runcatch(req) or 0
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 470, in _runcatch
    return _callcatch(ui, _runcatchfunc)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 480, in _callcatch
    return scmutil.callcatch(ui, func)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/scmutil.py", line 153, in callcatch
    return func()
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 460, in _runcatchfunc
    return _dispatch(req)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 1273, in _dispatch
    return runcommand(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 918, in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 1285, in _runcommand
    return cmdfunc()
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 1271, in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/util.py", line 1886, in check
    return func(*args, **kwargs)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/commands.py", line 1955, in clone
    r = hg.clone(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/hg.py", line 942, in clone
    exchange.pull(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/exchange.py", line 1668, in pull
    _maybeapplyclonebundle(pullop)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/exchange.py", line 2779, in _maybeapplyclonebundle
    if trypullbundlefromurl(repo.ui, repo, url):
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/exchange.py", line 2810, in trypullbundlefromurl
    bundle2.applybundle(repo, cg, tr, b'clonebundles', url)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 375, in applybundle
    return processbundle(repo, unbundler, lambda: tr, source=source)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 486, in processbundle
    processparts(repo, op, unbundler)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 494, in processparts
    _processpart(op, part)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 568, in _processpart
    handler(op, part)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 2025, in handlechangegroup
    ret = _processchangegroup(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 498, in _processchangegroup
    ret = cg.apply(op.repo, tr, source, url, **kwargs)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/changegroup.py", line 444, in apply
    newrevs, newfiles = _addchangegroupfiles(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/changegroup.py", line 1946, in _addchangegroupfiles
    added = fl.addgroup(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/filelog.py", line 168, in addgroup
    return self._revlog.addgroup(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlog.py", line 2620, in addgroup
    for data in deltas:
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlogutils/rewrite.py", line 783, in filter_delta_issue6528
    is_affected = _is_revision_affected_fast_inner(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlogutils/rewrite.py", line 649, in _is_revision_affected_fast_inner
    return _is_revision_affected_inner(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlogutils/rewrite.py", line 592, in _is_revision_affected_inner
    has_meta = raw_text.startswith(b'\x01\n')
AttributeError: 'memoryview' object has no attribute 'startswith'

** Extensions loaded: 
Traceback (most recent call last):
  File "/opt/homebrew/bin/hg", line 61, in <module>
    dispatch.run()
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 144, in run
    status = dispatch(req)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 250, in dispatch
    status = _rundispatch(req)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 294, in _rundispatch
    ret = _runcatch(req) or 0
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 470, in _runcatch
    return _callcatch(ui, _runcatchfunc)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 480, in _callcatch
    return scmutil.callcatch(ui, func)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/scmutil.py", line 153, in callcatch
    return func()
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 460, in _runcatchfunc
    return _dispatch(req)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 1273, in _dispatch
    return runcommand(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 918, in runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 1285, in _runcommand
    return cmdfunc()
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/dispatch.py", line 1271, in <lambda>
    d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/util.py", line 1886, in check
    return func(*args, **kwargs)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/commands.py", line 1955, in clone
    r = hg.clone(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/hg.py", line 942, in clone
    exchange.pull(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/exchange.py", line 1668, in pull
    _maybeapplyclonebundle(pullop)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/exchange.py", line 2779, in _maybeapplyclonebundle
    if trypullbundlefromurl(repo.ui, repo, url):
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/exchange.py", line 2810, in trypullbundlefromurl
    bundle2.applybundle(repo, cg, tr, b'clonebundles', url)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 375, in applybundle
    return processbundle(repo, unbundler, lambda: tr, source=source)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 486, in processbundle
    processparts(repo, op, unbundler)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 494, in processparts
    _processpart(op, part)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 568, in _processpart
    handler(op, part)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 2025, in handlechangegroup
    ret = _processchangegroup(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/bundle2.py", line 498, in _processchangegroup
    ret = cg.apply(op.repo, tr, source, url, **kwargs)
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/changegroup.py", line 444, in apply
    newrevs, newfiles = _addchangegroupfiles(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/changegroup.py", line 1946, in _addchangegroupfiles
    added = fl.addgroup(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/filelog.py", line 168, in addgroup
    return self._revlog.addgroup(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlog.py", line 2620, in addgroup
    for data in deltas:
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlogutils/rewrite.py", line 783, in filter_delta_issue6528
    is_affected = _is_revision_affected_fast_inner(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlogutils/rewrite.py", line 649, in _is_revision_affected_fast_inner
    return _is_revision_affected_inner(
  File "/opt/homebrew/Cellar/mercurial/5.9.1/lib/python3.9/site-packages/mercurial/revlogutils/rewrite.py", line 592, in _is_revision_affected_inner
    has_meta = raw_text.startswith(b'\x01\n')
AttributeError: 'memoryview' object has no attribute 'startswith'