[R-pkg-team] Bug#980809: Matrix package default tolerance on s390x (Re: Bug#980809: rmatrix: breaks autopkgtest of r-cran-glmmtmb on s390x)

[Dirk Eddelbuettel]

On 17 February 2021 at 16:58, Graham Inggs wrote:
| Hi Dirk
| 
| On Wed, 17 Feb 2021 at 15:10, Dirk Eddelbuettel <edd at debian.org> wrote:
| > Graham:  What does that bigendian box say for   Sys.info()[["machine"]]   ?
| 
| The other big-endian box I tested was perotto.debian.net [*], it says:
| 
| > Sys.info()[["machine"]]
| [1] "ppc64"
| 
| > Should we test for endianness instead?  And then maybe try to roll up to the
| > cause of the difference?
| 
| I've just tested on 32-bit big-endian and the glmmTMB problem does not
| occur there, so at this stage I would say test for big-endian **and**
| 64 bits.
| 
| Just to be clear, is the fix you are proposing in Matrix going to fix
| the glmmTMB error?

No. That may well be something else.

| If a bug shows up on 64-bit big-endian, but not on little-endian or
| 32-bit big-endian, then it's usually a sign that somewhere a 64-bit
| variable is incorrectly being read or written to as a 32-bit variable.

CRAN uses a Solaris machine for some endianness variability but I believe
that machine runs only 32bit.

Dirk
 
| Regards
| Graham
| 
| 
| [*] https://db.debian.org/machines.cgi?sortby=purpose&sortorder=dcs

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