Wrong number of arguments for dump in 2.7.0

[MihaiOnSoftware]

In our code base we have a call to the gem that looks like this:

JSON.dump(timestamp: datetime.to_s, log_type: "generic", message: msg).concat("\n")

We end up calling that line indirectly in a spec with data that makes it into:

JSON.dump(timestamp: "12342", log_type: "generic", message: "test").concat("\n")

We just upgraded to 2.7.0 today and it leads to the following error from inside the JSON gem:

ArgumentError:
  wrong number of arguments (given 0, expected 1..3)
/usr/local/bundle/gems/json-2.7.0/lib/json/common.rb:614:in `dump'

Please let me know if you need any more information.

[MihaiOnSoftware]

It seems that wrapping the arguments into a hash solves the issue:

JSON.dump({ timestamp: datetime.to_s, log_type: "generic", message: msg }).concat("\n")

If that's intentional it might make sense to include it in the compatibility changes

[MihaiOnSoftware]

Fixed in #553

[jcoyne]

Can that fix be released?

[hsbt]

@jcoyne We need to another fix like #558. After that, I'll release the new version.