trivial or significant test failure?

[Ben Abbott]

Using atlas-3.10.0 on MacOS X, I'm seeing this failure that at first glance 
looked trivial to me.  But after running the test several times I'm reliably 
getting the same answer. Should I open a bug report or just increase the 
tolerance?

Ben

>>>>> processing 
>>>>> /Users/bpabbott/Development/mercurial/default/src/DLD-FUNCTIONS/eigs.cc
  ***** testif HAVE_ARPACK
 [v1,d1] = eigs (A, k, "si");
 d1 = diag (d1);
 for i=1:k
   assert (max (abs ((A - d1(i)*eye (n))*v1(:,i))), 0, 1e-11);
 endfor
!!!!! test failed
assert (max (abs ((A - d1 (i) * eye (n)) * v1 (:, i))),0,1e-11) expected
0
but got
 3.0465e-11
maximum absolute error 3.04655e-11 exceeds tolerance 1e-11