[eigen] Memory leaks

[Mathieu Dutour <mathieu.dutour@xxxxxxxxx>]

Dear all,

I encountered some memory leaks in EIGEN.

Memory leaks are detected by valgrind and actually rather

violent in running the program (I had to use "ulimt -Sv 1000000"

in order to avoid freezing of my laptop).

To avoid typing Eigen::Dynamic all the time, I have chosen:

template <typename T> using MyVector=Eigen::Matrix<T,Eigen::Dynamic,1>;

template <typename T> using MyMatrix=Eigen::Matrix<T,Eigen::Dynamic,Eigen::Dynamic>;

and the type "T" is gmp_class from the GMP library, i.e.

infinite precision rational arithmetic.

I obtain the leak by writing

MyVector<T> V1=eMat.row(iRow);

I eliminate the leak by doing

MyVector<T> V1(nbCol);

V1=eMat.row(iRow);

I have also other memory leakage related to eigen but not as clear

cut as this one.

Used compiler is g++ 4.8.2 and g++ 4.9.2 (exactly same problem).

  Mathieu