From a32923a4398c0b0b530b91aa013e0d2b5770658c Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Wed, 29 Apr 2020 17:02:27 +0000
Subject: [PATCH] Fix (embarrassing) bug in blocked transpose.

---
 Eigen/src/Core/Transpose.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Eigen/src/Core/Transpose.h b/Eigen/src/Core/Transpose.h
index 962082812..0b57a4353 100644
--- a/Eigen/src/Core/Transpose.h
+++ b/Eigen/src/Core/Transpose.h
@@ -292,7 +292,8 @@ void BlockedInPlaceTranspose(MatrixType& m) {
     }
   }
   for (Index row = row_start; row < m.rows(); ++row) {
-    m.matrix().row(row).swap(m.matrix().col(row).transpose());
+    m.matrix().row(row).head(row).swap(
+        m.matrix().col(row).head(row).transpose());
   }
 }