I'm having trouble pinpointing the bad function pointer because chrome cuts off the end of the wasm file with: 
```
;; .... text is truncated due to size
```
Maybe I should follow the directions here, since this is a consistent nuisance.
https://www.diverto.hr/en/blog/2020-08-15-WebAssembly-limit/
I have a stack trace but the key info of what function is being called is missing. If chrome didn't truncate the wasm I could figure out what the callee is too.

I looked into this before at some point and IIRC the issue is that one initialization code path hands the Init function a spec but the a different path doesn't give it the spec. It wasn't obvious how to fix the problem.