crash when a mocha test fails with an error that has a circular data structure

[jandockx]

     >>> logs: Error: TypeError: Converting circular structure to JSON
     >>> logs:     at JSON.stringify (<anonymous>)
     >>> logs:     at makeSimple (node_modules/format-error/index.js:36:28)
     >>> logs:     at format (node_modules/format-error/index.js:39:21)
     >>> logs:     at Runner.<anonymous> (node_modules/mocha-reporter/index.js:283:18)

in runner.on('fail'…, the test.err is formatted with 'format-error'

'format-error' has a known problem with circular data structures since 2014 (
#2) which will not be fixed.

The author:

I think that this module shouldn't really exist. I'd rather fix this in prettyjson itself,

[jandockx]

maybe util.inspect would be a sensible replacement?

[jandppw]

https://www.npmjs.com/package/@ppwcode/mocha-ssst
https://bitbucket.org/ppwcode/mocha-ssst