From 6d5daf32f51c0903f89dfe8124d33b2152d9a625 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Mon, 25 Jul 2016 14:48:30 +0200
Subject: [PATCH] bug #1255: comment out broken and unsused line.

---
 unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h b/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
index ad5c97b57..9075fb3fa 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
@@ -159,7 +159,9 @@ class TensorExecutor<Expression, ThreadPoolDevice, Vectorizable> {
 #else
       size_t num_threads = device.numThreads();
       if (num_threads > 1) {
-        cost = evaluator.costPerCoeff(Vectorizable)
+        // FIXME: the following line is broken (see bug 1255),
+        //        but maybe the cost should be used somewhere to drive the execution.
+        //cost = evaluator.costPerCoeff(Vectorizable)
         num_threads = TensorCostModel<ThreadPoolDevice>::numThreads(
             size, evaluator.costPerCoeff(Vectorizable), num_threads);
       }