Invalid URL is throwing an error that is circular JSON

[hineshamin]

Summary

I am working through an issue with making an axios call to an invalid URL. A simple mistake I made in my URL is that when importing I was accidentally importing an object as the URL and so the request URL looked something like this "[object]/blog" which is an invalid URL. The error that was thrown by axios had circular JSON and so I was getting a very unhelpful error thrown by express that it could not parse circular JSON. Axios should throw errors that are natively able to be stringified from JSON so that I can stringify the error. PR #1625 looked to have fixed this issue however it looks like the same issue is occurring that it was looking to fix.

Context

• axios version: v0.18.0
• Environment: node v10.6.0, macOS v10.14.1

[hineshamin]

Closing this issue as I saw that this was fixed in v0.19.0 and I am using v0.18.0