From 4a0bdc38e1b8500b69717640143801aec6b1b2e4 Mon Sep 17 00:00:00 2001
From: Arne Morten Kvarving <arne.morten.kvarving@sintef.no>
Date: Mon, 2 Jan 2023 15:17:49 +0100
Subject: [PATCH] ISTLSolverEbos: avoid use of sstream

---
 opm/simulators/linalg/ISTLSolverEbos.cpp | 5 +++--
 opm/simulators/linalg/ISTLSolverEbos.hpp | 4 ++--
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/opm/simulators/linalg/ISTLSolverEbos.cpp b/opm/simulators/linalg/ISTLSolverEbos.cpp
index 7ddd8e77a..8eb3d0a94 100644
--- a/opm/simulators/linalg/ISTLSolverEbos.cpp
+++ b/opm/simulators/linalg/ISTLSolverEbos.cpp
@@ -106,8 +106,9 @@ std::function<Vector()> getWeightsCalculator(const PropertyTree& prm,
             weightsCalculator = trueFunc;
         } else {
             OPM_THROW(std::invalid_argument,
-                      "Weights type " << weightsType << "not implemented for cpr."
-                      << " Please use quasiimpes or trueimpes.");
+                      "Weights type " + weightsType +
+                      "not implemented for cpr."
+                      " Please use quasiimpes or trueimpes.");
         }
     }
     return weightsCalculator;
diff --git a/opm/simulators/linalg/ISTLSolverEbos.hpp b/opm/simulators/linalg/ISTLSolverEbos.hpp
index d6329ec4e..878702f3c 100644
--- a/opm/simulators/linalg/ISTLSolverEbos.hpp
+++ b/opm/simulators/linalg/ISTLSolverEbos.hpp
@@ -339,8 +339,8 @@ std::unique_ptr<Matrix> blockJacobiAdjacency(const Grid& grid,
             } else {
                 // Pointers should not change
                 if ( &(M.istlMatrix()) != matrix_ ) {
-                        OPM_THROW(std::logic_error, "Matrix objects are expected to be reused when reassembling!"
-                                  <<" old pointer was " << matrix_ << ", new one is " << (&M.istlMatrix()) );
+                        OPM_THROW(std::logic_error,
+                                  "Matrix objects are expected to be reused when reassembling!");
                 }
             }
             rhs_ = &b;