From murdoch at stats.uwo.ca  Thu Dec 18 03:47:39 2008
From: murdoch at stats.uwo.ca (Duncan Murdoch)
Date: Wed, 17 Dec 2008 21:47:39 -0500
Subject: [Rd] [R] "Error: bad value" problem
In-Reply-To: <4949ADC9.40409@biostat.ku.dk>
References: <20081217223408.F3D214CA07@egon.stats.ucl.ac.uk>	<D667981B-6F7E-4242-AC9D-50FD2AC3EAD8@auckland.ac.nz>	<4949949F.7080101@biostat.ku.dk>	<49499C78.9020700@biostat.ku.dk>
	<21065458.post@talk.nabble.com> <4949ADC9.40409@biostat.ku.dk>
Message-ID: <4949B9CB.1000308@stats.uwo.ca>

On 17/12/2008 8:56 PM, Peter Dalgaard wrote:
> Ben Bolker wrote:
>>   I can get the errors to happen on Ubuntu 8.10 with R --vanilla (*without*
>> valgrind) -- but
>> editing momfit.r line 742 so that plot.progress=FALSE seems to make the
>> problem go away.  (This was a lucky guess, it looked like there was
>> something
>> odd going on with the plots.)
>>
>>   Hope that helps someone ...
> 
> Probably not. The problem is to reproduce the error state in a way so 
> that we can understand what is causing it.
> 
> I can debug this to
> (gdb) bt
> #0  Rf_error (format=0x8220c65 "bad value") at 
> ../../../R/src/main/errors.c:704
> #1  0x0805a924 in SETCDR (x=0x8f89348, y=0x9b276e8)
>      at ../../../R/src/main/memory.c:2728
> #2  0x0819fa46 in GrowList (l=0x951e8f4, s=<value optimized out>) at 
> gram.y:958
> #3  0x081a2a7b in xxvalue (v=0x8f89348, k=4, lloc=<value optimized out>)
>      at gram.y:440
> 
> and the problem in GrowList is that CAR(l) is R_NilValue (==0x8f89348), 
> which supposedly "cannot happen", and the thing that calls GrowList is 
> something with srcrefs (DuncanM?).
> 
> Digging deeper probably has to wait till the weekend for my part. (The 
> natural next step is figuring out how the R_NilValue got into that 
> location, but I should try to sleep off this cold....)
> 
> I'm CCing r-devel on this. Can we move the discussion there?

I can probably take a look tomorrow.  I wasn't getting an error, but 
maybe I'll see the same corruption if I watch it run.

Duncan Murdoch

> 
> 
> 
>>   Ben Bolker
>>
>>> sessionInfo()
>> R version 2.8.0 (2008-10-20) 
>> i486-pc-linux-gnu 
>>
>> locale:
>> LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=C;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C
>>
>> attached base packages:
>> [1] stats     graphics  grDevices utils     datasets  methods   base    
> 
>



[Rd] [R] "Error: bad value" problem
Duncan Murdoch