macro expansion requiring backtracking with multiple ellipsis fails

[GoogleCodeExporter]

What steps will reproduce the problem?
$ ol
You see a prompt.
> (define-syntax pick (syntax-rules () ((pick a ... n 42 b c ... 43 c d ...) 
n)))
pick
> (pick 1 2 42 43 3 4 42 5 43 6 42 7 43)
Macro expansion failed:  
  error:  instruction 1052 info #(() ()) 
> 

Didn't find any Scheme that would even allow the pattern, but owl should do 
better ;) One more excuse to rewrite the macro expander at some point.

Original issue reported on code.google.com by aohelin on 10 Jan 2011 at 10:40