[Rcpp-devel] "Error during wrapup"

[John Mous]

Hmm, unfortunately the GitHub version failed also. The attributes on the
failed object are a little different though, here's what they look like:

Browse[1]> str(results)
 atomic [1:4] 1 1 2270 0
 - attr(*, "")= symbol sim
 - attr(*, "value")= promise to  NULL


On Tue, May 27, 2014 at 6:10 PM, John Mous <john.mous0 at gmail.com> wrote:

> Hi Kevin,
>
> Thanks. I will give the GitHub version a try -- the error usually
> manifests only after running for about a day or so, so it may take a while
> to do that. Unfortunately I am having trouble creating a small reproducible
> example -- a function with just the assignments as written in my previous
> e-mail works fine when executed thousands of times in a loop. The full
> code is not that long (~165 lines), but is also non-trivial.
>
> It's odd that something else is causing things to fail with the end result
> being that only the field *names*, which are hardcoded, and not the values,
> not coming through properly. Since you said you suspect the problem may be
> fixed, can you give me a hint of what you think it may be related to? This
> might help me isolate the piece of offending code.
>
>
>
> On Tue, May 27, 2014 at 5:46 PM, Kevin Ushey <kevinushey at gmail.com> wrote:
>
>> Hi John,
>>
>> I think we may have tackled this in some of the latest fixes with the
>> version of Rcpp on GitHub. Can you try installing that version and
>> trying again? Ie, try
>>
>>     install.packages(devtools); devtools::install_github("RcppCore/Rcpp")
>>
>> then try running your code again.
>>
>> Alternatively, please supply a small reproducible example that we can
>> try to run ourselves. You may be able to tease this error out
>> reproducibly if you run it with gctorture(TRUE) on.
>>
>> Thanks,
>> Kevin
>>
>> On Tue, May 27, 2014 at 2:42 PM, John Mous <john.mous0 at gmail.com> wrote:
>> > Hello,
>> >
>> > I am passing back a very simple std::map<std::string, int> from Rcpp as
>> > follows:
>> >
>> > std::map<std::string, int> result;
>> > result["X1"] = X1;
>> > result["X2"] = X2;
>> > result["X3"] = X3;
>> > result["X4"] = X4;
>> > return wrap(result);
>> >
>> > The keys are hardcoded as shown, and the values X1-X4 are ints. Almost
>> > always everything works fine, however, very intermittently, a vector is
>> > returned on the R side _without_ named fields. For example:
>> >
>> > Browse[1]> results
>> > [1]   1   2 863   0
>> > Error during wrapup: 'getCharCE' must be called on a CHARSXP
>> > Browse[1]> str(results)
>> >  atomic [1:4] 1 2 863 0
>> >  - attr(*, "")= symbol X1
>> >  - attr(*, "")= language `[[<-`(`*tmp*`, sim, value = 1L)
>> >
>> > results[[X1]] works, but results[["X1"]] does not, and X2-X4 can be
>> > retrieved only by index. However, again, most runs are successful:
>> >
>> > Browse[1]> results
>> >  X1  X2  X3  X4
>> >    1    1 3254    0
>> > Browse[1]> str(results)
>> >  Named int [1:4] 1 1 3254 0
>> >  - attr(*, "names")= chr [1:4] "X1" "X2" "X3" "X4"
>> >
>> >
>> > I am using R 3.1.0 and Rcpp 0.11.1. Does the message "Error during
>> wrapup:
>> > 'getCharCE' must be called on a CHARSXP" within this context hint
>> anything
>> > to anyone familiar with Rcpp's internals? I realize it's almost
>> impossible
>> > to diagnose with the given information -- is there a way to get Rcpp to
>> > display more debugging information?
>> >
>> > Thank you.
>> >
>> > _______________________________________________
>> > Rcpp-devel mailing list
>> > Rcpp-devel at lists.r-forge.r-project.org
>> > https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.r-forge.r-project.org/pipermail/rcpp-devel/attachments/20140528/2094f6f1/attachment.html>