error in process sentinel: async-when-done: Invalid read syntax: "#"

[simendsjo]

Checklist

• I followed the troubleshooting guide and it did not address my issue
• I've included a link to a Github Gist with the full contents of my troubleshooting.org buffer
• Each section below is filled in and includes sufficient detail to reproduce the issue

NOTE

• I had to redact some information from troubleshooting.org as it included a lot of sensitive information!
• Not sure how reproducible it is for other, but for me, it happens 100% of the time

Expected Behavior

Running async block, replacing result with the results.

Actual Behavior

error in process sentinel: async-when-done: Invalid read syntax: "#"
error in process sentinel: Invalid read syntax: "#"

Steps to Reproduce

I get the same error for all blocks with :async

Troubleshooting Artifacts

https://gist.github.com/simendsjo/c39671e029a63c40dce342b446ddf023