1 files changed, 9 insertions, 0 deletions
diff --git a/test/eigensolver_generic.cpp b/test/eigensolver_generic.cpp
index e18fbf687..d0e644d4b 100644
--- a/test/eigensolver_generic.cpp
+++ b/test/eigensolver_generic.cpp
@@ -76,6 +76,15 @@ template<typename MatrixType> void eigensolver(const MatrixType& m)
     EigenSolver<MatrixType> eig(a.adjoint() * a);
     eig.compute(a.adjoint() * a);
   }
+
+  // regression test for bug 478
+  {
+    a.setZero();
+    EigenSolver<MatrixType> ei3(a);
+    VERIFY_IS_EQUAL(ei3.info(), Success);
+    VERIFY_IS_MUCH_SMALLER_THAN(ei3.eigenvalues().norm(),RealScalar(1));
+    VERIFY((ei3.eigenvectors().transpose()*ei3.eigenvectors().transpose()).eval().isIdentity());
+  }
 }
 
 template<typename MatrixType> void eigensolver_verify_assert(const MatrixType& m)