--- a/mercurial/commands.py	Thu Feb 02 10:02:40 2017 +0100
+++ b/mercurial/commands.py	Thu Feb 02 10:03:31 2017 +0100
@@ -49,7 +49,6 @@
     revset,
     scmutil,
     server,
-    smartset,
     sshserver,
     streamclone,
     templatekw,
@@ -1856,99 +1855,6 @@
     with repo.wlock(False):
         return cmdutil.copy(ui, repo, pats, opts)
 
-@command('debugrevspec',
-    [('', 'optimize', None,
-      _('print parsed tree after optimizing (DEPRECATED)')),
-     ('p', 'show-stage', [],
-      _('print parsed tree at the given stage'), _('NAME')),
-     ('', 'no-optimized', False, _('evaluate tree without optimization')),
-     ('', 'verify-optimized', False, _('verify optimized result')),
-     ],
-    ('REVSPEC'))
-def debugrevspec(ui, repo, expr, **opts):
-    """parse and apply a revision specification
-
-    Use -p/--show-stage option to print the parsed tree at the given stages.
-    Use -p all to print tree at every stage.
-
-    Use --verify-optimized to compare the optimized result with the unoptimized
-    one. Returns 1 if the optimized result differs.
-    """
-    stages = [
-        ('parsed', lambda tree: tree),
-        ('expanded', lambda tree: revset.expandaliases(ui, tree)),
-        ('concatenated', revset.foldconcat),
-        ('analyzed', revset.analyze),
-        ('optimized', revset.optimize),
-    ]
-    if opts['no_optimized']:
-        stages = stages[:-1]
-    if opts['verify_optimized'] and opts['no_optimized']:
-        raise error.Abort(_('cannot use --verify-optimized with '
-                            '--no-optimized'))
-    stagenames = set(n for n, f in stages)
-
-    showalways = set()
-    showchanged = set()
-    if ui.verbose and not opts['show_stage']:
-        # show parsed tree by --verbose (deprecated)
-        showalways.add('parsed')
-        showchanged.update(['expanded', 'concatenated'])
-        if opts['optimize']:
-            showalways.add('optimized')
-    if opts['show_stage'] and opts['optimize']:
-        raise error.Abort(_('cannot use --optimize with --show-stage'))
-    if opts['show_stage'] == ['all']:
-        showalways.update(stagenames)
-    else:
-        for n in opts['show_stage']:
-            if n not in stagenames:
-                raise error.Abort(_('invalid stage name: %s') % n)
-        showalways.update(opts['show_stage'])
-
-    treebystage = {}
-    printedtree = None
-    tree = revset.parse(expr, lookup=repo.__contains__)
-    for n, f in stages:
-        treebystage[n] = tree = f(tree)
-        if n in showalways or (n in showchanged and tree != printedtree):
-            if opts['show_stage'] or n != 'parsed':
-                ui.write(("* %s:\n") % n)
-            ui.write(revset.prettyformat(tree), "\n")
-            printedtree = tree
-
-    if opts['verify_optimized']:
-        arevs = revset.makematcher(treebystage['analyzed'])(repo)
-        brevs = revset.makematcher(treebystage['optimized'])(repo)
-        if ui.verbose:
-            ui.note(("* analyzed set:\n"), smartset.prettyformat(arevs), "\n")
-            ui.note(("* optimized set:\n"), smartset.prettyformat(brevs), "\n")
-        arevs = list(arevs)
-        brevs = list(brevs)
-        if arevs == brevs:
-            return 0
-        ui.write(('--- analyzed\n'), label='diff.file_a')
-        ui.write(('+++ optimized\n'), label='diff.file_b')
-        sm = difflib.SequenceMatcher(None, arevs, brevs)
-        for tag, alo, ahi, blo, bhi in sm.get_opcodes():
-            if tag in ('delete', 'replace'):
-                for c in arevs[alo:ahi]:
-                    ui.write('-%s\n' % c, label='diff.deleted')
-            if tag in ('insert', 'replace'):
-                for c in brevs[blo:bhi]:
-                    ui.write('+%s\n' % c, label='diff.inserted')
-            if tag == 'equal':
-                for c in arevs[alo:ahi]:
-                    ui.write(' %s\n' % c)
-        return 1
-
-    func = revset.makematcher(tree)
-    revs = func(repo)
-    if ui.verbose:
-        ui.note(("* set:\n"), smartset.prettyformat(revs), "\n")
-    for c in revs:
-        ui.write("%s\n" % c)
-
 @command('debugsetparents', [], _('REV1 [REV2]'))
 def debugsetparents(ui, repo, rev1, rev2=None):
     """manually set the parents of the current working directory