APPEND is too strict
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#224 APPEND is too strict
closed-fixed
nobody
None
5
2007-04-03
2007-04-03
Anonymous
No
(APPEND 10) yields an error, not 10, as it should, according to R5RS, section 6.3.2, page 27:
(APPEND list ...)
...
The resulting list is always newly allocated, except that it shares structure with the last argument. The last argument may actually be any object; an improper list results if the last argument is not a proper list.
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Fixed in CVS.
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Are we sure this is the right thing to do? The statement in R5RS is actually ambiguous. It says "an improper list results if the last argument is not a proper list". Now, 10 is *not* an improper list.