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

Duncan Murdoch murdoch at stats.uwo.ca
Thu Dec 18 04:07:04 CET 2008

On 17/12/2008 9:47 PM, Duncan Murdoch wrote:
> 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.

I had time to see if I was getting a NilValue there tonight, and the 
answer was no, with the Windows RC.  I don't get the error in any 
version I've tried on Windows, though I can see it in 2.8.0 on MacOSX.

> Duncan Murdoch
>>>   Ben Bolker
>>>> sessionInfo()
>>> R version 2.8.0 (2008-10-20) 
>>> i486-pc-linux-gnu 
>>> locale:
>>> attached base packages:
>>> [1] stats     graphics  grDevices utils     datasets  methods   base    
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