[Rd] memory bug in is.na[n]() (PR#952)

[Thomas Lumley]

On 28 May 2001, Peter Dalgaard BSA wrote:

> Thomas Lumley <tlumley@u.washington.edu> writes:
>
> > On Mon, 28 May 2001 maechler@stat.math.ethz.ch wrote:
> >
> > > I've forgotten to submit this as bug report
> > > (and haven't easily seen how to debug).
> > >
> > > The bug is both for  is.na() and is.nan()  {which makes much sense since
> > > 					the C code of the two is very similar!};
> > > only one is shown below.
> >
> > I think I've found it - I'll do a bit more testing.
>

Committed.  The ans variable wasn't protected. This only matters when
is.nan returns a warning, as otherwise there is no more allocation before
the result is returned and protected by the caller.

Similar errors happened with is.na(.GlobalEnv) or is.na(new.env()).

	-thomas


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