bug of recent-keys?

[Kenichi Handa]

When report-emacs-bug is called via menu-bar->Help->Send Bug Report,
This error is signaled (after I enter Subject)
        Two bases given in one event
This is because the result of (recent-keys) in this code:
  (interactive (reverse (list (recent-keys) (read-string "Bug Subject: "))))
contains this element:
        (help-echo nil nil nil nil -1)
and single-key-description signals the above error when it
gets this argument.

Is this a bug of recent-keys or single-key-description?

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Ken'ichi HANDA
address@hidden