--- a/hgext/mq.py
+++ b/hgext/mq.py
@@ -502,7 +502,7 @@ class queue:
         if opts.get('rev'):
             if not self.applied:
                 raise util.Abort(_('no patches applied'))
-            revs = [int(r) for r in cmdutil.revrange(ui, repo, opts['rev'])]
+            revs = cmdutil.revrange(ui, repo, opts['rev'])
             if len(revs) > 1 and revs[0] > revs[1]:
                 revs.reverse()
             for rev in revs:
@@ -1276,7 +1276,7 @@ class queue:
             if files:
                 raise util.Abort(_('option "-r" not valid when importing '
                                    'files'))
-            rev = [int(r) for r in cmdutil.revrange(self.ui, repo, rev)]
+            rev = cmdutil.revrange(self.ui, repo, rev)
             rev.sort(lambda x, y: cmp(y, x))
         if (len(files) > 1 or len(rev) > 1) and patchname:
             raise util.Abort(_('option "-n" not valid when importing multiple '

--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -49,7 +49,7 @@ def revrange(ui, repo, revs):
             return defval
         return repo.changelog.rev(repo.lookup(val))
 
-    seen = {}
+    seen, l = {}, []
     for spec in revs:
         if revrangesep in spec:
             start, end = spec.split(revrangesep, 1)
@@ -60,13 +60,15 @@ def revrange(ui, repo, revs):
                 if rev in seen:
                     continue
                 seen[rev] = 1
-                yield rev
+                l.append(rev)
         else:
             rev = revfix(repo, spec, None)
             if rev in seen:
                 continue
             seen[rev] = 1
-            yield rev
+            l.append(rev)
+
+    return l
 
 def make_filename(repo, pat, node,
                   total=None, seqno=None, revwidth=None, pathname=None):

--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -102,7 +102,7 @@ def walkchangerevs(ui, repo, pats, opts)
         defrange = '%s:0' % repo.changectx().rev()
     else:
         defrange = 'tip:0'
-    revs = map(int, cmdutil.revrange(ui, repo, opts['rev'] or [defrange]))
+    revs = cmdutil.revrange(ui, repo, opts['rev'] or [defrange])
     wanted = {}
     slowpath = anypats
     fncache = {}
@@ -1375,7 +1375,7 @@ def export(ui, repo, *changesets, **opts
     """
     if not changesets:
         raise util.Abort(_("export requires at least one changeset"))
-    revs = list(cmdutil.revrange(ui, repo, changesets))
+    revs = cmdutil.revrange(ui, repo, changesets)
     if len(revs) > 1:
         ui.note(_('exporting patches:\n'))
     else:
@@ -1841,8 +1841,7 @@ def log(ui, repo, *pats, **opts):
     count = 0
 
     if opts['copies'] and opts['rev']:
-        endrev = max([int(i)
-                      for i in cmdutil.revrange(ui, repo, opts['rev'])]) + 1
+        endrev = max(cmdutil.revrange(ui, repo, opts['rev'])) + 1
     else:
         endrev = repo.changelog.count()
     rcache = {}