Crash when using `.shell()` and `.fillet()`

Running the following script causes a crash to desktop:
```
import cadquery as cq
result = (cq.Workplane("XY")
.box(50, 50, 20)
.faces("+Z")
.shell(-1, kind="intersection")
.edges()
.fillet(1)
)
```

Terminal output follows:
```
Windows fatal exception: access violation

Thread 0x000019b8 (most recent call first):
File "selectors.py", line 314 in _select
File "selectors.py", line 323 in select
File "asyncio\base_events.py", line 1823 in _run_once
File "asyncio\base_events.py", line 570 in run_forever
File "tornado\platform\asyncio.py", line 199 in start
File "ipykernel\iostream.py", line 76 in _thread_main
File "threading.py", line 870 in run
File "threading.py", line 932 in _bootstrap_inner
File "threading.py", line 890 in _bootstrap

Thread 0x00001990 (most recent call first):
File "threading.py", line 302 in wait
File "threading.py", line 558 in wait
File "IPython\core\history.py", line 829 in run
File "IPython\core\history.py", line 58 in needs_sqlite
File "", line 2 in run
File "threading.py", line 932 in _bootstrap_inner
File "threading.py", line 890 in _bootstrap

Current thread 0x00000550 (most recent call first):
File "cadquery\occ_impl\shapes.py", line 1931 in fillet
File "cadquery\cq.py", line 1169 in fillet
File "", line 7 in
File "cq_editor\widgets\debugger.py", line 190 in _exec
File "cq_editor\widgets\debugger.py", line 232 in render
File "cq_editor\__main__.py", line 27 in main
File "run.py", line 14 in
```

I suspect this is due to the `fillet` value being physically impossible, though I doubt "hard crash to desktop" was the intended behavior. While this exact combination causes a crash, changing values of shell and fillet to other impossible values results in the incredibly unhelpful error message `StdFail_NotDone: BRep_API: command not done`. `kind` does not seem to make a difference.

CQ-editor version: 0.2
Windows version: Windows 10 Pro 22H2