[Rcpp-devel] package using Rcpp aborting with: terminate called after throwing an instance of 'Rcpp::not_compatible' inside class__newInstance()

[Dirk Eddelbuettel]

Simon, Carlos, Prateek,

It's an issue between R and guitar. Rcpp is an bystander.  

Upon cloning and running R CMD INSTALL we see it end on

*** installing help indices
** building package indices
** testing if installed package can be loaded
Found more than one class "Rcpp_Reference" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Reference" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Repository" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Repository" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Index" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Index" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_OID" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_OID" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_ODBObject" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_ODBObject" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_ODB" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_ODB" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Commit" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Commit" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Tree" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Tree" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_TreeEntry" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_TreeEntry" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Blob" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Blob" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Tag" in cache; using the first, from namespace 'guitar'
Found more than one class "Rcpp_Tag" in cache; using the first, from namespace 'guitar'
* DONE (guitar)
edd at max:~/git/guitar(master)$ 

We had the same thing in the Rcpp examples and did this:

2015-08-26  Dirk Eddelbuettel  <edd at debian.org>

        * inst/unitTests/testRcppClass/src/rcpp_module.cpp: Renamed Module
        'World' to 'RcppClassWorld' to avoid multiple modules with same name
        (pull request #351, fixed issue #350)

        * inst/unitTests/testRcppClass/man/Rcpp_class_examples.Rd: Ditto
        * inst/unitTests/testRcppClass/R/load.R: Ditto
        * inst/unitTests/testRcppClass/NAMESPACE: Ditto
        * inst/unitTests/runit.Module.client.package.R: Re-enable test

        * inst/unitTests/testRcppModule/src/rcpp_module.cpp: Renamed Module
        'World' to 'RcppModuleWorld' to avoid multiple modules with same name

        * inst/unitTests/cpp/modref.cpp: Rename 'World' to 'ModRefWorld'
        * inst/unitTests/runit.modref.R (test.modRef): Ditto

        * inst/unitTests/cpp/Module.cpp: Rename 'World' to 'ModuleWorld'
        * inst/unitTests/runit.Module.R (test.Module): Ditto

2015-08-25  Kurt Hornik  <Kurt.Hornik at wu.ac.at>

        * R/loadModule.R: For now=TRUE, always set .botched to FALSE which
        corresponds to the case of the methods package being in the search path
        * inst/include/Rcpp/Reference.h: Call call with the internal Namespace


Something was changed (by MMae as I recall) in that period that affects the
name lookup and you simply cannot more than one reference to the same name.
I have not yet looked into guitar -- it may just be that its build is weird
and symbols appear multiple times.

But "someone" needs to disentangle this.

Dirk

-- 
http://dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org