to_torch segmentation fault apple metal

[lstrgar]

Describe the bug
Segmentation fault when converting taichi metal field to torch mps device

To Reproduce

> import taichi as ti
[Taichi] version 1.6.0, llvm 15.0.7, commit f1c6fbbd, osx, python 3.10.3

> ti.init(arch=ti.metal,)
[Taichi] Starting on arch=metal

> x = ti.field(dtype=ti.f32, shape=())
> x[None] = 1
> x.to_torch('mps')
73850 segmentation fault  ipython

Log/Screenshots

[Taichi] version 1.6.0, llvm 15.0.7, commit f1c6fbbd, osx, python 3.10.3
[Taichi] Starting on arch=metal
[1]    74506 segmentation fault  python tmp.py

Additional comments
I'm running oxs 13.0.1

[bobcao3]

Can you try using the nightly version? I think we've fixed this issue but it's not released yet.