[Rd] R-3.0.1 - "transient" make check failure in splines-EX.r

[Paul Gilbert]

Avraham

I resolved this only by switching to a different BLAS on the 32 bit 
machine.Since no one else seemed to be having problems, I considered it 
possible that there was a hardware issue on my old 32 bit machine. The R 
check test failed somewhat randomly, but often. most disconcertingly, it 
failed because it gives different answers. If you source the code in an 
R session a few times you have no trouble reproducing this. It gives the 
impression of an improperly zeroed matrix.

(All this from memory, I'm on the road.)

Paul

On 13-05-28 06:36 PM, Adler, Avraham wrote:
>
> Hello.
>
> I seem to be having the same problem that Paul had in the thread titled "[Rd] R 2.15.2 make check failure on 32-bit --with-blas="-lgoto2"" from October of last year <https://stat.ethz.ch/pipermail/r-devel/2012-October/065103.html> Unfortunately, that thread ended without an answer to his last question.
>
> Briefly, I am trying to compile an Rblas for Windows NT 32bit using OpenBlas (successor to GotoBlas) (Nehalem - corei7), and the compiled version passes all tests except for the "splines-Ex" test in the exact same place that Paul had issues:
>
> ~~~~
>> stopifnot(identical(ns(x), ns(x, df = 1)),
> +           identical(ns(x, df = 2), ns(x, df = 2, knots = NULL)), # not true till 2.15.2
> +           !is.null(kk <- attr(ns(x), "knots")), # not true till 1.5.1
> +           length(kk) == 0)
> Error: identical(ns(x, df = 2), ns(x, df = 2, knots = NULL)) is not TRUE
> ~~~~
>
> Yet, opening up R and running the actual code shows that the error is transient:
>
> ~~~~
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] FALSE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] TRUE
>> identical(ns(x, df = 2), ns(x, df = 2, knots = NULL))
> [1] FALSE
> ~~~~
>
> This is the only error I have on the 32-bit version, I believe (trying to build a blas for 64-bit on SandyBridge is a completely different kettle of fish that is causing me to pull out what little hair I have left), and if it can be solved that would be great.
>
> Thank you,
>
> Avraham
>
>
>
>
>