NiMlr

BUG: scipy.optimize.linprog does not fulfill integer constraints yet reports success

2

### Describe your issue. Hi, [According to the docs](https://github.com/scipy/scipy/blob/b4114a651601d439144d91ef9381e81a1749e6bc/scipy/optimize/_linprog.py#L340), integrality constraints for linear programming are supplied as a one-dimensions array containing an integer. However, apparently they are not always fulfilled,...