Possible Linux setup issue across platforms

[eddelbuettel]

I have been working on my anytime package and noticed something strange when running check_for_cran(). This is likely related to TZ and timezone settings. I consistently get the 'basic' Fedora and Ubuntu setups to fail, while Debian SAN/UBSAN passes.

It is of course entirely possible that I am doing something wrong or silly with the TZ detection. But it a) passes for me under all settings at home (using "America/Chicago") and b) also passes in Docker container when I use not TZ setting or when I use TZ="UTC". There is a known issue with Europe/London but that is different.

I worked around the issue by limiting tests when in release -- my scheme is using a.b.c as a release version whereas a.b.c.d is a development version in which all tests runs. So when reproducing make sure DESCRIPTION has an added digit for the version. To recap:

This has four passes for 0.3.4 because fewer tests run, for 0.3.4.1 all run and the two failure occur on

Platform: Ubuntu Linux 16.04 LTS, R-release, GCC
Platform: Fedora Linux, R-devel, clang, gfortran

Let me if / how I can help.