mq: abort if no files or revisions are specified for qimport

hgext/mq.py

@@ -1885,6 +1885,8 b' class queue(object):'
                                    'files'))
             rev = scmutil.revrange(repo, rev)
             rev.sort(reverse=True)
+        elif not files:
+            raise util.Abort(_('no files or revisions specified'))
         if (len(files) > 1 or len(rev) > 1) and patchname:
             raise util.Abort(_('option "-n" not valid when importing multiple '
                                'patches'))

tests/test-mq-qimport.t

@@ -22,6 +22,12 b''
   $ hg init repo
   $ cd repo
 
+qimport without file or revision
+
+  $ hg qimport
+  abort: no files or revisions specified
+  [255]
+
 qimport non-existing-file
 
   $ hg qimport non-existing-file