fennel: evaluating a macro that defines a nested function fails

I have a fennel buffer with these contents (reduced from a macro in my nvim config):

```fennel
(macro m []
  (fn f [] 1)
  `1)

(fn []
  (m))
```

when I evaluate the buffer I get this error in the log:
```
; eval (buf): 
; [Compile] ...m/site/pack/core/opt/conjure/lua/conjure/nfnl/fennel.lua:1069: attempt to index field 'options' (a nil value)
```