@qnzhou maybe you could take a look?

I would like to use libigl but get memory errors ("^tetrahedralize: TETGEN CRASHED... KABOOOM!!!
malloc_consolidate(): invalid chunk size").

For debugging I try to run the unit tests but they stop with a failed assertion:

$ GTEST_COLOR=1 ctest --verbose

[...]
1: [ RUN ] all_meshes/upsample.V_comes_first_F_ordering/truck_obj
1: igl_tests: /mnt/ascadian/geomtools/libigl-unit-tests/libigl/external/eigen/Eigen/src/Core/DenseCoeffsBase.h:337: Eigen::DenseCoeffsBase<Derived, 1>::Scalar& Eigen::DenseCoeffsBase<Derived, 1>::operator()(Eigen::DenseCoeffsBase<Derived, 1>::Index, Eigen::DenseCoeffsBase<Derived, 1>::Index) [with Derived = Eigen::Matrix<int, -1, -1>; Eigen::DenseCoeffsBase<Derived, 1>::Scalar = int; Eigen::DenseCoeffsBase<Derived, 1>::Index = long int]: Assertion `row >= 0 && row < rows() && col >= 0 && col < cols()' failed.
1/1 Test #1: run_igl_tests ....................***Exception: Other 17.16 sec

0% tests passed, 1 tests failed out of 1

Total Test time (real) = 17.17 sec

The following tests FAILED:
1 - run_igl_tests (OTHER_FAULT)
Errors while running CTest

I tried to run them on Arch Linux with different compilers and Ubuntu 17.10 with gcc 7.2.

Do you have any idea what could cause the problem or how to debug it better?

Just to make a note here, I noticed igl::point_simplex_squared_distance(...) uses Eigen::MatrixBase<Derived> for some of its output arguments, which is causing qslim unit test to fail because Eigen::MatrixBase<Derived>::resize(...) is actually just an assertion check, and the actual resizing is implemented in Eigen::PlainObjectBase<Derived>::resize().

My eigen is 3.2.9 from macport.