------- Comment From [email protected] 2016-09-13 11:23 EDT-------
Bug has been fixed with following patch reported in 
http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1285

Should be fixed:
https://bitbucket.org/eigen/eigen/commits/3806ea6d2b5d/
Summary:     Bug 1285: fix regression introduced in changeset 6c00c9378f16

Konstantinos Margaritis 2016-09-13 06:12:04 UTC

Confirmed that it works on ppc64le

# HG changeset patch
# User Gael Guennebaud <[email protected]>
# Date 1473746319 -7200
# Node ID 3806ea6d2b5d09fb28e0a248ec914317a25ec9f7
# Parent  799e3315e2b00e598e0b9900bab37d6d17d5bfa1
Bug 1285: fix regression introduced in changeset 6c00c9378f16

diff --git a/Eigen/src/LU/FullPivLU.h b/Eigen/src/LU/FullPivLU.h
--- a/Eigen/src/LU/FullPivLU.h
+++ b/Eigen/src/LU/FullPivLU.h
@@ -436,7 +436,7 @@
Index m_nonzero_pivots;
RealScalar m_l1_norm;
RealScalar m_maxpivot, m_prescribedThreshold;
-    char m_det_pq;
+    signed char m_det_pq;
bool m_isInitialized, m_usePrescribedThreshold;
};
diff --git a/Eigen/src/LU/PartialPivLU.h b/Eigen/src/LU/PartialPivLU.h
--- a/Eigen/src/LU/PartialPivLU.h
+++ b/Eigen/src/LU/PartialPivLU.h
@@ -284,7 +284,7 @@
PermutationType m_p;
TranspositionType m_rowsTranspositions;
RealScalar m_l1_norm;
-    char m_det_p;
+    signed char m_det_p;
bool m_isInitialized;
};

** Bug watch added: eigen.tuxfamily.org/bz/ #1285
   http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1285

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https://bugs.launchpad.net/bugs/1592065

Title:
  Move Eigen package version to 3.1

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