output of argument w does not work

[[Imported from SVN: r1739]]

dune/istl/solvers.hh

@@ -1310,8 +1310,7 @@ namespace Dune {
           }
           H[i+1][i] = _sp.norm(w);
           if (H[i+1][i] == 0.0)
-            DUNE_THROW(ISTLError,"breakdown in GMRes - |w| "
-                       << w << " == 0.0 after " << j << " iterations");
+            DUNE_THROW(ISTLError,"breakdown in GMRes - |w| == 0.0 after " << j << " iterations");
           // v[i+1] = w * (1.0 / H[i+1][i]);
           v[i+1] = w; v[i+1] *= (1.0 / H[i+1][i]);