From maechler@stat.math.ethz.ch  Mon May 28 09:39:28 2001
From: maechler@stat.math.ethz.ch (maechler@stat.math.ethz.ch)
Date: Mon, 28 May 2001 10:39:28 +0200 (MET DST)
Subject: [Rd] memory bug in is.na[n]() (PR#952)
Message-ID: <200105280839.KAA05566@pubhealth.ku.dk>

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.

Martin

------- start of forwarded message -------
From: Martin Maechler <maechler@stat.math.ethz.ch>
To: R-core@stat.math.ethz.ch
Subject: another is.nan  BUG  found by gctorture-testing demo(is.things)
Date: Thu, 12 Apr 2001 14:51:06 +0200

demo() being part of strict tests (since this morning),
reveals another bug in is.nan()
in both branches, but already in 1.2.2 
(ie. certainly not caused by Peter's recent fix) :

 gctorture(FALSE) # default
 is.nan(NULL)
 #-> logical(0)

 gctorture()
 is.nan(NULL)

Looks pretty strange :  {calling it subsequently does sometimes not reproduce}

> gctorture()
> is.nan(NULL)
$names
 [1] "is.nan() applied to non-(list or vector)"
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Warning message: 
is.nan() applied to non-(list or vector) in: is.nan(NULL) 
> 
------- end of forwarded message -------

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[Rd] memory bug in is.na[n]() (PR#952)
maechler@stat.math.ethz.ch