nlohmann::detail::parse_error thrown when an extra List is added to a Scratch program

[yaxollum]

In the zip file attached (parse_error_files.zip), there are 4 files: hello2.sb3, hello2.scrape, hello3.sb3, and hello3.scrape.

Both hello2.sb3 and hello3.sb3 are Scratch programs with a simple say("Hello!") statement. The only difference between them is that hello2.sb3 has an extra List called memory. These are the contents of memory:

In hello2.scrape, memory is represented like this:

"lists": {"16": [8, "0", "0", -4, -1, 1, 54]}

When I try to run hello2.scrape, I get the following error:

terminate called after throwing an instance of 'nlohmann::detail::type_error'
  what():  [json.exception.type_error.302] type must be string, but is number
Aborted (core dumped)

When I run hello3.scrape, the output is normal:

Hello!

[HillcrestEnigma]

Seems like a scrapec bug.