--- a/hgext/rebase.py	Fri Aug 17 10:19:17 2018 +0900
+++ b/hgext/rebase.py	Fri Aug 17 10:21:25 2018 +0900
@@ -864,7 +864,7 @@
         except error.InMemoryMergeConflictsError:
             ui.warn(_('hit merge conflicts; re-running rebase without in-memory'
                       ' merge\n'))
-            _dorebase(ui, repo, 'abort', opts)
+            _dorebase(ui, repo, action='abort', opts={})
             return _dorebase(ui, repo, action, opts, inmemory=False)
     else:
         return _dorebase(ui, repo, action, opts)

--- a/tests/test-rebase-inmemory.t	Fri Aug 17 10:19:17 2018 +0900
+++ b/tests/test-rebase-inmemory.t	Fri Aug 17 10:21:25 2018 +0900
@@ -361,8 +361,14 @@
   transaction abort!
   rollback completed
   hit merge conflicts; re-running rebase without in-memory merge
-  abort: abort and continue do not allow specifying revisions
-  [255]
+  rebase aborted
+  rebasing 2:177f92b77385 "c"
+  rebasing 3:055a42cdd887 "d"
+  rebasing 4:e860deea161a "e"
+  merging e
+  warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
+  unresolved conflicts (see hg resolve, then hg rebase --continue)
+  [1]
 
 ==========================
 Test for --confirm option|