Created attachment 450 [details]
program illustrating the problem
JacobiSVD fails to terminate on this 3x3 matrix of doubles:
0, 2.22045e-16, 0.5,
0, -0.5, 0,
nan, 0, 0;
and on this 4x4 matrix matrix of doubles:
1, 0, 0, 0,
0, 3, 1, 2e-308,
1, 0, 1, nan,
0, nan, nan, 0;
The attached program illustrates this behavior.
We expect termination because the documentation claims that "the computation is guaranteed to terminate in finite (and reasonable) time"
I can reproduce the problem in revision 5877:732325de4d56.
(This issue was found as part of the ASTAA robustness testing project.)
Fixed and back-ported to 3.2:
Date: 2014-09-10 11:54:20
Summary: Fix bug 791: infinite loop in JacobiSVD in the presence of NaN.
-- GitLab Migration Automatic Message --
This bug has been migrated to gitlab.com's GitLab instance and has been closed from further activity.
You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.com/libeigen/eigen/issues/791.