bug#9567: curious match bug (?)

[Andy Wingo <wingo@pobox.com>]

Hi,

Try this:

  (use-modules (language tree-il) (ice-9 match))
  (define foo (parse-tree-il '(let-values (apply (lambda () (lambda-case ((() #f #f #f () ()) (apply (primitive values) (const 1) (const 2)))))) (lambda-case (((a b) #f #f #f () (#{a 134390}# #{b 134391}#)) (apply (primitive list) (lexical a #{a 134390}#) (lexical b #{b 134391}#)))))))
  (match foo
    (($ <let-values> src exp
        ($ <lambda-case> src2 req #f #f #f () gensyms body #f))
     #t)
    (_
     #f))
  => #t
                         
  (match foo
    (($ <let-values> src foo ;; <- rename "exp" to "foo"
        ($ <lambda-case> src2 req #f #f #f () gensyms body #f))
     #t)
    (_
     #f))
  => #f

I tried to reduce this case a bit, but didn't succeed directly, and I
need to move on.  But what is the deal here?

Andy
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