Unexpected alias expansion in history list

[Haakon Riiser <haakon.riiser@xxxxxxxxxx>]

The following "bug" is probably not important, since it only
happens in a syntactically illegal command, but I chose to report
it anyway, in case the bug has other (more serious) symptomps.

Steps to reproduce:

  % zsh -f
  % alias foo='foo bar'
  % (foo) foo
  zsh: parse error near `foo'
  % history
      1  alias foo='foo bar'
      2  (foo) foo bar
               ^^^^^^^
Here, the second "foo" has been expanded.  This only happens when
the first word in the alias expansion is the same as the name of
the alias being expanded.

Verified on the following systems:

  zsh 4.1.1 (i686-pc-linux-gnu)
  zsh 4.0.2 (i686-pc-linux-gnu)
  zsh 4.0.2 (sparc-sun-solaris2.6)
  zsh 3.0.6 (sparc-sun-solaris2.6)

-- 
 Haakon