In [1]: import pygeos
In [5]: pygeos.box(1, 1, 2, float("nan"))                                                                                                                          
Out[5]: <pygeos.Geometry POLYGON ((2 1, 2 nan, 1 nan, 1 1, 2 1))>
In [6]: pygeos.box(float("nan"), 1, 2, 2)                                                                                                                          
Out[6]: <pygeos.Geometry POLYGON ((2 1, 2 2, nan 2, nan 1, 2 1))>
In [7]: pygeos.box(1, float("nan"), 2, 2)                                                                                                                          
Segmentation fault (core dumped)
In [2]: pygeos.box(1, 1, float("nan"), 2)                                                                                                                          
Segmentation fault (core dumped)