[S] Feature or bug?

["Paul Y. Peng" <ypeng@math.mun.ca>]

In S-PLUS 3.3 (DEC Alpha) and S-PLUS 2000,

> z <- c("a"=1, "b"=2)
> lapply(z, function(x)names(x))
$a:
[1] "a"

$b:
[1] "b"

But in S-PLUS 5.1 (Linux),

> z <- c("a"=1, "b"=2)
> lapply(z, function(x)names(x))
$a:
NULL

$b:
NULL

Is this a new feature of S-PLUS 5? Do I miss anything in
S-PLUS 5? Thank you for your help.

Paul.
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