[R-pkg-devel] weird C stack traces from win-builder, due to brms/rstan load?

[Duncan Murdoch]

On 05/07/2021 10:32 a.m., Ben Bolker wrote:
>    I'm running into trouble checking a new release of the 'broom.mixed'
> package <https://cran.r-project.org/web/packages/broom.mixed/index.html>
> on win-builder.  I think it is some kind of rstan problem.
> 
>     The broom.mixed package loads the brms package, and loads several
> pre-computed objects from the brms package; I don't think it actually
> tries to run anything of the functions from brms during the check process.
> 
>     At several points during checking (see
> <https://win-builder.r-project.org/LsDDMqpnX52n/00check.log>), I get
> voluminous "C stack trace" outputs: once when "Checking dependencies in
> R code", once when calling require(brms) as part of an example, once
> when running the tests (not easy to determine the precise location, and
> once when building the vignettes).
> 
>     The trace starts like this:
> 
> ==== C stack trace ===============================
> 
> 	SETCAR [0x0x6c838a90+32]
> 	ZN4Rcpp8CppClassC1EPNS_6ModuleEPNS_10class_BaseERNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE [0x0x6ac093ff+1151]
> 	ZN4Rcpp6Module12classes_infoEv [0x0x6ac07467+327]
> 	Z20Module__classes_infoP7SEXPREC [0x0x6abe1c4a+74]
> 	Rf_NewFrameConfirm [0x0x6c7a7d18+33960]
> 	R_initAssignSymbols [0x0x6c7f3259+53849]
> 	Rf_eval [0x0x6c7fcd31+369]
> ...
> 
>     and goes on for a while.
> 
>     R CMD check runs fine on Linux with recent r-devel.
> 
>     Has anyone seen this?  Other than scrubbing all references to brms
> and rstan (a second try with one of the brms references avoided instead
> runs into trouble when loading rstan ...), I don't see what I can do ...
> 
> <https://win-builder.r-project.org/YArr24tuYZ8G/00check.log>
> 

What error do you get before the stack trace?

The Z... names look like C++ entry points to overloaded functions or 
methods.  There's a command line function (c++filt) that will usually 
turn those into their original readable form.  It's not working for me 
on the names you've got; maybe because I'm on a Mac, and that was 
compiled on Windows.  Perhaps someone else knows how to demangle those 
names?

Duncan Murdoch