diff --git a/hgext/largefiles/__init__.py b/hgext/largefiles/__init__.py
--- a/hgext/largefiles/__init__.py
+++ b/hgext/largefiles/__init__.py
@@ -111,6 +111,7 @@ import lfcommands
 import proto
 import reposetup
 import uisetup as uisetupmod
+import overrides
 
 # Note for extension authors: ONLY specify testedwith = 'internal' for
 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
@@ -130,3 +131,4 @@ def uisetup(ui):
     uisetupmod.uisetup(ui)
 
 cmdtable = lfcommands.cmdtable
+revsetpredicate = overrides.revsetpredicate
diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py
+++ b/hgext/largefiles/overrides.py
@@ -12,7 +12,7 @@ import os
 import copy
 
 from mercurial import hg, util, cmdutil, scmutil, match as match_, \
-        archival, pathutil, revset, error
+        archival, pathutil, registrar, revset, error
 from mercurial.i18n import _
 
 import lfutil
@@ -801,7 +801,7 @@ def overridepull(orig, ui, repo, source=
         ui.status(_("%d largefiles cached\n") % numcached)
     return result
 
-revsetpredicate = revset.extpredicate()
+revsetpredicate = registrar.revsetpredicate()
 
 @revsetpredicate('pulled()')
 def pulledrevsetsymbol(repo, subset, x):
diff --git a/hgext/largefiles/uisetup.py b/hgext/largefiles/uisetup.py
--- a/hgext/largefiles/uisetup.py
+++ b/hgext/largefiles/uisetup.py
@@ -171,5 +171,3 @@ def uisetup(ui):
         if name == 'transplant':
             extensions.wrapcommand(getattr(module, 'cmdtable'), 'transplant',
                 overrides.overridetransplant)
-
-    overrides.revsetpredicate.setup()
diff --git a/hgext/mq.py b/hgext/mq.py
--- a/hgext/mq.py
+++ b/hgext/mq.py
@@ -70,6 +70,7 @@ from mercurial import extensions, error,
 from mercurial import patch as patchmod
 from mercurial import lock as lockmod
 from mercurial import localrepo
+from mercurial import registrar
 from mercurial import subrepo
 import os, re, errno, shutil
 
@@ -3536,7 +3537,7 @@ def summaryhook(ui, repo):
         # i18n: column positioning for "hg summary"
         ui.note(_("mq:     (empty queue)\n"))
 
-revsetpredicate = revset.extpredicate()
+revsetpredicate = registrar.revsetpredicate()
 
 @revsetpredicate('mq()')
 def revsetmq(repo, subset, x):
@@ -3575,8 +3576,6 @@ def extsetup(ui):
         if extmodule.__file__ != __file__:
             dotable(getattr(extmodule, 'cmdtable', {}))
 
-    revsetpredicate.setup()
-
 colortable = {'qguard.negative': 'red',
               'qguard.positive': 'yellow',
               'qguard.unguarded': 'green',
diff --git a/hgext/rebase.py b/hgext/rebase.py
--- a/hgext/rebase.py
+++ b/hgext/rebase.py
@@ -16,7 +16,7 @@ https://mercurial-scm.org/wiki/RebaseExt
 
 from mercurial import hg, util, repair, merge, cmdutil, commands, bookmarks
 from mercurial import extensions, patch, scmutil, phases, obsolete, error
-from mercurial import copies, destutil, repoview, revset
+from mercurial import copies, destutil, repoview, registrar, revset
 from mercurial.commands import templateopts
 from mercurial.node import nullrev, nullid, hex, short
 from mercurial.lock import release
@@ -76,7 +76,7 @@ def _destrebase(repo, sourceset):
     return destutil.destmerge(repo, action='rebase', sourceset=sourceset,
                               onheadcheck=False)
 
-revsetpredicate = revset.extpredicate()
+revsetpredicate = registrar.revsetpredicate()
 
 @revsetpredicate('_destrebase')
 def _revsetdestrebase(repo, subset, x):
@@ -1325,4 +1325,3 @@ def uisetup(ui):
         ['rebasestate', _('hg rebase --continue')])
     # ensure rebased rev are not hidden
     extensions.wrapfunction(repoview, '_getdynamicblockers', _rebasedvisible)
-    revsetpredicate.setup()
diff --git a/hgext/transplant.py b/hgext/transplant.py
--- a/hgext/transplant.py
+++ b/hgext/transplant.py
@@ -19,7 +19,7 @@ import os, tempfile
 from mercurial.node import short
 from mercurial import bundlerepo, hg, merge, match
 from mercurial import patch, revlog, scmutil, util, error, cmdutil
-from mercurial import revset, templatekw, exchange
+from mercurial import registrar, revset, templatekw, exchange
 
 class TransplantError(error.Abort):
     pass
@@ -694,7 +694,7 @@ def _dotransplant(ui, repo, *revs, **opt
         if cleanupfn:
             cleanupfn()
 
-revsetpredicate = revset.extpredicate()
+revsetpredicate = registrar.revsetpredicate()
 
 @revsetpredicate('transplanted([set])')
 def revsettransplanted(repo, subset, x):
@@ -714,7 +714,6 @@ def kwtransplanted(repo, ctx, **args):
     return n and revlog.hex(n) or ''
 
 def extsetup(ui):
-    revsetpredicate.setup()
     templatekw.keywords['transplanted'] = kwtransplanted
     cmdutil.unfinishedstates.append(
         ['transplant/journal', True, False, _('transplant in progress'),
diff --git a/mercurial/dispatch.py b/mercurial/dispatch.py
--- a/mercurial/dispatch.py
+++ b/mercurial/dispatch.py
@@ -33,6 +33,7 @@ from . import (
     fancyopts,
     hg,
     hook,
+    revset,
     ui as uimod,
     util,
 )
@@ -752,6 +753,7 @@ def _checkshellalias(lui, ui, args, prec
 #   extraobj) arguments
 extraloaders = [
     ('cmdtable', commands, 'loadcmdtable'),
+    ('revsetpredicate', revset, 'loadpredicate'),
 ]
 
 def _dispatch(req):
diff --git a/tests/test-revset.t b/tests/test-revset.t
--- a/tests/test-revset.t
+++ b/tests/test-revset.t
@@ -2191,28 +2191,21 @@ test error message of bad revset
 
   $ cd ..
 
-Test registrar.delayregistrar via revset.extpredicate
-
-'extpredicate' decorator shouldn't register any functions until
-'setup()' on it.
+Test that revset predicate of extension isn't loaded at failure of
+loading it
 
   $ cd repo
 
   $ cat <<EOF > $TESTTMP/custompredicate.py
-  > from mercurial import revset
+  > from mercurial import error, registrar, revset
   > 
-  > revsetpredicate = revset.extpredicate()
+  > revsetpredicate = registrar.revsetpredicate()
   > 
   > @revsetpredicate('custom1()')
   > def custom1(repo, subset, x):
   >     return revset.baseset([1])
-  > @revsetpredicate('custom2()')
-  > def custom2(repo, subset, x):
-  >     return revset.baseset([2])
   > 
-  > def uisetup(ui):
-  >     if ui.configbool('custompredicate', 'enabled'):
-  >         revsetpredicate.setup()
+  > raise error.Abort('intentional failure of loading extension')
   > EOF
   $ cat <<EOF > .hg/hgrc
   > [extensions]
@@ -2220,13 +2213,8 @@ Test registrar.delayregistrar via revset
   > EOF
 
   $ hg debugrevspec "custom1()"
+  *** failed to import extension custompredicate from $TESTTMP/custompredicate.py: intentional failure of loading extension
   hg: parse error: unknown identifier: custom1
   [255]
-  $ hg debugrevspec "custom2()"
-  hg: parse error: unknown identifier: custom2
-  [255]
-  $ hg debugrevspec "custom1() or custom2()" --config custompredicate.enabled=true
-  1
-  2
 
   $ cd ..