From b55dab7f2118e59834bcea85d98d2644c4ce614d Mon Sep 17 00:00:00 2001
From: Charles Schlosser <cs.schlosser@gmail.com>
Date: Sat, 12 Oct 2024 21:03:30 +0000
Subject: [PATCH] Fix DenseBase::tail for Dynamic template argument

---
 Eigen/src/plugins/BlockMethods.inc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/plugins/BlockMethods.inc b/Eigen/src/plugins/BlockMethods.inc
index 122a2f4ab..46dc9ddd1 100644
--- a/Eigen/src/plugins/BlockMethods.inc
+++ b/Eigen/src/plugins/BlockMethods.inc
@@ -1304,14 +1304,14 @@ EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE typename ConstFixedSegmentReturnType<N>::T
 template <int N>
 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE typename FixedSegmentReturnType<N>::Type tail(Index n = N) {
   EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived)
-  return typename FixedSegmentReturnType<N>::Type(derived(), size() - n);
+  return typename FixedSegmentReturnType<N>::Type(derived(), size() - n, n);
 }
 
 /// This is the const version of tail<int>.
 template <int N>
 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE typename ConstFixedSegmentReturnType<N>::Type tail(Index n = N) const {
   EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived)
-  return typename ConstFixedSegmentReturnType<N>::Type(derived(), size() - n);
+  return typename ConstFixedSegmentReturnType<N>::Type(derived(), size() - n, n);
 }
 
 /// \returns the \a outer -th column (resp. row) of the matrix \c *this if \c *this