add more failtests

failtest/map_nonconst_ctor_on_const_ptr_4.cpp

@@ -0,0 +1,15 @@
+#include "../Eigen/Core"
+
+#ifdef EIGEN_SHOULD_FAIL_TO_BUILD
+#define CV_QUALIFIER
+#else
+#define CV_QUALIFIER const
+#endif
+
+using namespace Eigen;
+
+void foo(const float *ptr, DenseIndex rows, DenseIndex cols){
+    Map<CV_QUALIFIER MatrixXf, Unaligned, OuterStride<> > m(ptr, rows, cols, OuterStride<>(2));
+}
+
+int main() {}