How to use pretty debugging printers to see Eigen objects in QtCreator?

Question

I am trying to see the contents of an Eigen vector in the Locals and Expressions window of the QtCreator:

Answer 1

Works for me as expected. The output looks like

vec (10 x 1), ColumnMajor   Eigen::VectorXd
    [0] 3.1400000000000001  double
    [1] 3.1400000000000001  double
    [2] 3.1400000000000001  double
    [3] 3.1400000000000001  double
    [4] 3.1400000000000001  double
    [5] 3.1400000000000001  double
    [6] 3.1400000000000001  double
    [7] 3.1400000000000001  double
    [8] 3.1400000000000001  double
    [9] 3.1400000000000001  double

Make sure to use Qt Creator's own pretty-printing system by removing(!) the checkmark in Tools/Options/Debugger/GDB/Load system pretty printers. You also don't need the code you put into your .gdbinit in this case.