[R] debug vs regular mode

Zhang, Peng pczhang at med.umich.edu
Fri Aug 10 21:23:38 CEST 2012


Ok. I will stop here. I have just created a bug report.

https://bugs.r-project.org/bugzilla3/show_bug.cgi?id=15013

If anyone is interested, please see if you can reproduce it.

Thanks,
Peng

On 08/10/2012 03:04 PM, peter dalgaard wrote:
> Not to spoil your fun, but this is getting a bit off-topic for R-help. If you wish to continue the debugging process in public, I think you should move to R-devel.
>
> Also, it sounds like the problem is in the glmulti package, so you might want to involve its maintainer at some point.
>
> -pd
>
> On Aug 10, 2012, at 19:51 , Zhang, Peng wrote:
>
>> Thanks! It is interesting that Windows has pointed the problem to Java.
>> So it is probable that how I did my debug led me to the wrong direction.
>>
>> Since I was unsure how to debug S4 class, I copied the source implement
>> R function from glmulti package into my testing program.
>>
>> The segmentation fault will appear when I step to "neotete =
>> terms(as.formula(paste("h~",paste(preds, collapse="*"))))". That is why
>> I have asked my initial question on the board.
>>
>> The more interesting thing is that if I don't run library(glmulti), but
>> just the following lines, I won't have problem when I stepped to that
>> terms function.
>>
>> I am totally lost. It is not clear to me how to debug S4 class.
>>
>> Best,
>> Peng
>>
>> ### beginning
>> library(glmulti)
>>
>> testdata = cbind(Y=rnorm(100), data.frame(matrix(rnorm(100*50), ncol = 50)))
>>
>> glmulti =
>> function(y, xr, data, exclude, name, intercept, marginality , bunch,
>> chunk, chunks,
>>          level, minsize, maxsize, minK, maxK,
>> method,crit,confsetsize,popsize,mutrate,
>>          sexrate,imm, plotty,  report, deltaM, deltaB, conseq,
>> fitfunction, resumefile, includeobjects, ...) {
>>      if (missing(data))
>>          tete = terms(y)
>>      else
>>          tete = terms(y, data=data)
>>      oo = attr(tete,"order")
>>      dep = as.character(attr(tete,"variables"))[2]
>>      int = attr(tete,"intercept")
>>      preds = as.character(attr(tete,"variables"))[-(1:2)]
>>      if (level==2 && max(oo)>1) {
>>          # get all possible interactions
>>          interac = attr(tete,"term.labels")[oo==2]
>>          neotete = terms(as.formula(paste("h~",paste(preds, collapse="*"))))
>>          neointerac= attr(neotete,"term.labels")[attr(neotete,"order")==2]
>>          # get exclusions
>>          for (i in interac)
>>              neointerac=neointerac[neointerac!=i]
>>          # same for main effects
>>          mama = attr(tete,"term.labels")[oo==1]
>>          exma = preds
>>          for (j in mama)
>>              exma = exma[exma!=j]
>>          exma = c(exma,neointerac)
>>      } else {
>>          preds = attr(tete,"term.labels")[oo==1]
>>          exma=c(1)
>>      }
>>      call = match.call()
>>      call[[match("y", names(call))]] = dep
>>      call[[length(names(call))+1]] = preds
>>      names(call)[length(names(call))] ="xr"
>>          call[[length(names(call))+1]] = exma
>>      names(call)[length(names(call))] ="exclude"
>>
>>      if (missing(data)) {
>>          call[[length(names(call))+1]] = environment(y)
>>          names(call)[length(names(call))] ="data"
>>      }
>>      eval(call)
>> }
>>
>> debug(glmulti)
>>
>> glmulti(Y~(X1+X2+X3+X4+X5+X6+X7+X8+X9+X10+X11+X12+X13+X14+X15)*X16,
>> xr=NULL, data = testdata, level = 2)
>> ###end
>>
>> On 08/10/2012 11:47 AM, Henric (Nilsson) Winell wrote:
>>> On 2012-08-10 15:42, Zhang, Peng wrote:
>>>
>>>> You are right. I am running Arch Linux. However, I obtained a
>>>> segmentation directly, so didn't know where to find the bug??
>>>>
>>>>> library("glmulti")
>>>> Loading required package: rJava
>>>>> testdata = cbind(Y=rnorm(100), data.frame(matrix(rnorm(100*50), ncol
>>>> = 50)))
>>>>> glmulti(Y~(X1+X2+X3+X4+X5+X6+X7+X8+X9+X10+X11+X12+X13+X14+X15)*X16,
>>>> data= testdata, level = 2)
>>>> Segmentation fault
>>>>
>>>> Is this information "Error in .jnew("glmulti/ModelGenerator", y,
>>>> jarray(xc), .jarray(xq),  : java.lang.ArrayIndexOutOfBoundsException:
>>>> 15" only in Windows, or did you see it under Fedora as well?
>>> Windows only.  Fedora just returned "Segmentation fault".
>>>
>>>
>>> //Henric
>>>
>>>
>>>
>>>> Thank you!
>>>>
>>>> Peng
>>>>
>>>> BTW:
>>>>
>>>> $ uname -a
>>>> Linux Precision 3.4.7-1-ARCH #1 SMP PREEMPT Sun Jul 29 22:02:56 CEST
>>>> 2012 x86_64 GNU/Linux
>>>>
>>>>> sessionInfo()
>>>> R version 2.15.1 (2012-06-22)
>>>> Platform: x86_64-unknown-linux-gnu (64-bit)
>>>>
>>>> locale:
>>>>    [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
>>>>    [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
>>>>    [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
>>>>    [7] LC_PAPER=C                 LC_NAME=C
>>>>    [9] LC_ADDRESS=C               LC_TELEPHONE=C
>>>> [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
>>>>
>>>> attached base packages:
>>>> [1] stats     graphics  grDevices utils     datasets  methods base
>>>>
>>>>
>>>> On 08/10/2012 09:25 AM, Henric (Nilsson) Winell wrote:
>>>>> On 2012-08-10 06:10, Zhang, Peng wrote:
>>>>>
>>>>>> Thanks to both for your reply.
>>>>>>
>>>>>> library(glmulti)
>>>>>> testdata = cbind(Y=rnorm(100), data.frame(matrix(rnorm(100*50), ncol
>>>>>> = 50)))
>>>>>> glmulti(Y~(X1+X2+X3+X4+X5+X6+X7+X8+X9+X10+X11+X12+X13+X14+X15)*X16,
>>>>>> data
>>>>>> = testdata, level = 2)
>>>>>>
>>>>>> This is reproducible to get a segmentation fault.
>>>>> There's some information missing here, notably the output from
>>>>> 'sessionInfo()', but I guess this is under GNU/Linux.  I can confirm a
>>>>> seg. fault under Fedora FC17 x86_64.
>>>>>
>>>>> Under Windows 7 64-bit, however, we get some further info:
>>>>>
>>>>>> library("glmulti")
>>>>> Loading required package: rJava
>>>>>> testdata = cbind(Y=rnorm(100), data.frame(matrix(rnorm(100*50), ncol
>>>>> = 50)))
>>>>>> glmulti(Y~(X1+X2+X3+X4+X5+X6+X7+X8+X9+X10+X11+X12+X13+X14+X15)*X16,
>>>>> data
>>>>> + = testdata, level = 2)
>>>>> Initialization...
>>>>> Error in .jnew("glmulti/ModelGenerator", y, .jarray(xc),
>>>>> .jarray(xq),  :
>>>>>    java.lang.ArrayIndexOutOfBoundsException: 15
>>>>>> sessionInfo()
>>>>> R version 2.15.1 Patched (2012-08-06 r60178)
>>>>> Platform: x86_64-w64-mingw32/x64 (64-bit)
>>>>>
>>>>> locale:
>>>>> [1] LC_COLLATE=Swedish_Sweden.1252 LC_CTYPE=Swedish_Sweden.1252
>>>>> [3] LC_MONETARY=Swedish_Sweden.1252 LC_NUMERIC=C
>>>>> [5] LC_TIME=Swedish_Sweden.1252
>>>>>
>>>>> attached base packages:
>>>>> [1] stats     graphics  grDevices utils     datasets  methods base
>>>>>
>>>>> other attached packages:
>>>>> [1] glmulti_1.0.4 rJava_0.9-3
>>>>> So, this doesn't seem to be a bug in R and is thus likely to need the
>>>>> attention of the 'glmulti' package's maintainer.
>>>>>
>>>>>
>>>>> HTH,
>>>>> Henric
>>>>>
>>>>>
>>>>>
>>>>>> But I have troubles to
>>>>>> extract the exact information from this S4 class to make a simpler
>>>>>> example because of my limited knowledge on S4 class. The author of the
>>>>>> package is busy at the moment, and does not have time to look into it.
>>>>>>
>>>>>> Peng
>>>>>>
>>>>>> On 08/09/2012 10:25 PM, R. Michael Weylandt
>>>>>> <michael.weylandt at gmail.com>
>>>>>> wrote:
>>>>>>> On Aug 9, 2012, at 9:14 PM, David Winsemius <dwinsemius at comcast.net>
>>>>>>> wrote:
>>>>>>>
>>>>>>>> On Aug 9, 2012, at 4:56 PM, Zhang, Peng wrote:
>>>>>>>>
>>>>>>>>> Dear all,
>>>>>>>>>
>>>>>>>>> I had a R segmentation fault, and then invoked debug mode and ran
>>>>>>>>> step
>>>>>>>>> by step.
>>>>>>>>> 2. Why does the same function behave differently under debug and
>>>>>>>>> regular
>>>>>>>>> mode?
>>>>>>>> I cannot help you there.
>>>>>>>>
>>>>>>> Though a reproducible segfault is certainly worth a bug report if
>>>>>>> you can do so, in debug or regular modes.
>>>>>>>
>>>>>>> You may wish to search stackoverflow for tips on how to make a great
>>>>>>> reproducible example in R.
>>>>>>>
>>>>>>> Michael
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>>>>>> ______________________________________________
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>>>>>> PLEASE do read the posting guide
>>>>>> http://www.R-project.org/posting-guide.html
>>>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>>>
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>>>>
>> **********************************************************
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>> ______________________________________________
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