System Information
Operating system: Windows 10
Blender Version
Broken:
Short description of error
Blender crashes when the co_hair() method is called on the particle system in the attached file.
Exact steps for others to reproduce the error
It gives only Segmentation Fault:11, in console.
https://docs.blender.org/api/current/bpy.types.ParticleSystem.html#bpy.types.ParticleSystem.co_hair
Seems that your object doesn't have cache?
> blender.exe!rna_ParticleSystem_co_hair(ParticleSystem * particlesystem, Object * object, int particle_no, int step, float * n_co) Line 366 C blender.exe!ParticleSystem_co_hair_call(bContext * C, ReportList * reports, PointerRNA * _ptr, ParameterList * _parms) Line 5139 C blender.exe!RNA_function_call(bContext * C, ReportList * reports, PointerRNA * ptr, FunctionRNA * func, ParameterList * parms) Line 7594 C blender.exe!pyrna_func_call(BPy_FunctionRNA * self, _object * args, _object * kw) Line 6148 C
particlesystem->pathcache was NULL
The particles are disabled for the viewport and have not been evaluated, so there is nothing that can be queried.
We can fix the crash, but to get the actual position the particles need to be enabled.