Matrix inner product crashes on x86_64 (PR#8715)

On Mon, 27 Mar 2006, Prof Brian Ripley wrote:

Not reproducible for me (and do you really think that something as simple as
this would not have been found on x86_64 long before now?)
This is almost certainly caused by your use of an inappropriate external BLAS.
Something has probably been compiled for a different processor than the one
you are using, since illegal instructions are a compiler (not R) issue that I
have seen quite often on ix86 systems when this happened.
Use --without-blas when recompiling R and see if it then works.

Thank you for the prompt reply. Disabling the external BLAS fixed
the problem as you suspected.

(As a minor curiosity, the problem was not caught by any tests
ran by make check or make check-all -- but I do not presume here
to speculate or guess whether the tests try out any such matrix
calculations or not.). :)

Thanks again,
J.

On Mon, 27 Mar 2006, jtlindgr at cs.helsinki.fi wrote:

Matrix inner product seems to crash R2.2.1 on a 64bit arch.
More precisely, the crash happens atleast if the matrix is
non-square. The bug can be reproduced (atleast here) with

bash$ bin/R

X<-matrix(data=0,nrow=100,ncol=10);
mat<-X%*%t(X);

Illegal instruction
bash$

The crash doesnt happen if the matrix is specified square,
e.g. 10x10. The underlying OS was

Linux version 2.6.12-xeon-csl3 (root at chuck) (gcc version 3.4.5 20050809
(prerelease) (Ubuntu 3.4.4-6ubuntu8)) #1 SMP Wed Feb 22 18:34:17 EET 2006

and its running on Intel(R) Xeon(TM) MP CPU 3.66GHz.

I configured R from the source tar.gz myself; each phase of
"./configure --with-x=no ; make ; make install"
passed without aborting on any errors.


Cheers,
J.

--please do not edit the information below--

Version:
platform = x86_64-unknown-linux-gnu
arch = x86_64
os = linux-gnu
system = x86_64, linux-gnu
status =
major = 2
minor = 2.1
year = 2005
month = 12
day = 20
svn rev = 36812
language = R

Locale:
LC_CTYPE=fi_FI at euro;LC_NUMERIC=C;LC_TIME=en_US.ISO-8859-15;LC_COLLATE=en_US.IS
O-8859-15;LC_MONETARY=fi_FI at euro;LC_MESSAGES=en_US.ISO-8859-15;LC_PAPER=C;LC_N
AME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=C;LC_IDENTIFICATION=C

Search Path:
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