[Bug 5655] New: Crash on mips64el

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[Bug 5655] New: Crash on mips64el

mercurial-bugs-2
https://bz.mercurial-scm.org/show_bug.cgi?id=5655

            Bug ID: 5655
           Summary: Crash on mips64el
           Product: Mercurial
           Version: 4.3
          Hardware: PC
                OS: Linux
            Status: UNCONFIRMED
          Severity: bug
          Priority: wish
         Component: Mercurial
          Assignee: [hidden email]
          Reporter: [hidden email]
                CC: [hidden email]

This only seems to happen with the C extensions built on mips64el:

Traceback (most recent call last):
  File "../../../../../hg", line 45, in <module>
    mercurial.dispatch.run()
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 81, in run
    status = (dispatch(req) or 0) & 255
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 162, in
dispatch
    ret = _runcatch(req)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 302, in
_runcatch
    return _callcatch(ui, _runcatchfunc)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 310, in
_callcatch
    return scmutil.callcatch(ui, func)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/scmutil.py", line 150, in
callcatch
    return func()
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 292, in
_runcatchfunc
    return _dispatch(req)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 896, in
_dispatch
    cmdpats, cmdoptions)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 658, in
runcommand
    ret = _runcommand(ui, options, cmd, d)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 904, in
_runcommand
    return cmdfunc()
  File "/home/mithrandi/mercurial-4.3.1/mercurial/dispatch.py", line 893, in
<lambda>
    d = lambda: util.checksignature(func)(ui, *args, **strcmdopt)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/util.py", line 1079, in check
    return func(*args, **kwargs)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/commands.py", line 5370, in
update
    updatecheck=updatecheck)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/hg.py", line 778, in
updatetotally
    ret = _update(repo, checkout, updatecheck=updatecheck)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/hg.py", line 715, in update
    stats = updaterepo(repo, node, False, updatecheck=updatecheck)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/hg.py", line 711, in
updaterepo
    updatecheck=updatecheck)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/merge.py", line 1629, in
update
    followcopies, matcher=matcher, mergeforce=mergeforce)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/merge.py", line 987, in
calculateupdates
    acceptremote, followcopies)
  File "/home/mithrandi/mercurial-4.3.1/mercurial/merge.py", line 852, in
manifestmerge
    for f, ((n1, fl1), (n2, fl2)) in diff.iteritems():
TypeError: 'NoneType' object is not iterable

At this point, `diff` is this:

{'new': (('T\xe5453\x1bB\x88V\xb7\xd6\x91B\xfc\xea5\x0fL\x1e\x0e', ''), (None,
'')), 'base': None, 'old': None}

I would guess this is a bug in the mercurial/cext/manifest.c but I'm a bit out
of my depth tracking it down. (To reproduce, you can run one of the many
failing tests on mips64el, for example test-obsolete-checkheads.t)

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