Test failure with gsl package / help needed

[Julien Bect]

Hi all,

I am seeing "random" test failures with the gsl package (on a Debian 
testing, x86_64-linux-gnu, Octave 4.0.3, gcc 6.1.1).

The failure occurs after several (might be 2, might be 20...) calls to 
test_gslsf:

>> pkg load gsl
>> test_gslsf
PASSES 25 out of 25 tests
>> test_gslsf
PASSES 25 out of 25 tests
>> test_gslsf
PASSES 25 out of 25 tests
>> test_gslsf
PASSES 25 out of 25 tests
>> test_gslsf
PASSES 25 out of 25 tests
>> test_gslsf
PASSES 25 out of 25 tests

....  (run many times)

>> test_gslsf
***** test # (int, double, double) to double
 conicalP_cyl_reg_sc=zeros(N,1);
 conicalP_cyl_reg_sc_err=zeros(N,1);
 for i=1:N
   [conicalP_cyl_reg_sc(i) 
conicalP_cyl_reg_sc_err(i)]=conicalP_cyl_reg(xi(i),xd(i),xd2(i));
 end
 [conicalP_cyl_reg_vec 
conicalP_cyl_reg_vec_err]=conicalP_cyl_reg(xi,xd,xd2);
 conicalP_cyl_reg_val=conicalP_cyl_reg(xi,xd,xd2);
 assert(norm(conicalP_cyl_reg_val(:)-conicalP_cyl_reg_vec(:))==0.0)
 assert(norm(conicalP_cyl_reg_sc(:)-conicalP_cyl_reg_vec(:))==0.0)
 assert(norm(conicalP_cyl_reg_sc_err(:)-conicalP_cyl_reg_vec_err(:))==0.0)
!!!!! test failed
GSL error 11 at legendre_con.c, line 108: error


I would like to know if others see the same thing.

To test you have to checkout the gsl repo 
(https://sourceforge.net/p/octave/gsl/ci/default/tree/) and then:

make dist
cd target && octave
>> pkg install gsl-1.1.0.tar.gz
>> pkg load gsl
>> test_gslsf
>> test_gslsf
>> test_gslsf
...


@++
Julien