This e-mail concerns the release RcppParallel 5.0.0. You are receiving
this e-mail because you are maintaining one or more packages on CRAN
that depend on the RcppParallel package.
Packages depending on RcppParallel often have issues with ASAN / UBSAN
warnings, originating from use of RcppParallel's bundled TBB library
(https://software.intel.com/en-us/tbb). Unfortunately, these issues
have not been resolved upstream, and I have not been able to resolve
these warnings myself as well.
To alleviate this, with RcppParallel 5.0.0, it is now possible to
configure the parallel backend used by RcppParallel by setting the
RCPP_PARALLEL_BACKEND environment variable. For example:
This explicitly affects the C++ 'parallelFor' and 'parallelReduce'
APIs provided by RcppParallel.
To avoid ASAN / UBSAN warnings in future CRAN submissions, it is
highly recommended that you call:
Sys.setenv(RCPP_PARALLEL_BACKEND = "tinythread")
before your test suite is run.
If your package explicitly requires TBB-specific functionality, you
will likely need to explain this in your submission as you will almost
certainly see the aforementioned ASAN / UBSAN errors during testing.
Finally, and most importantly, I hope you and your family are staying
safe during the Coronavirus pandemic.
Email from Kevin Ushey 17/03/2020