Node 11.12.0 ESM mangling line numbers

[CodeOtter]

My package.json has the following entries

  "esm": {
    "cjs": true,
     sourceMap: true
  },
  "ava": {
    "require": [
      "esm"
    ]
  },

When I run ava, errors return extreme wrong line numbers.

No .babelrc exists. No other configuration override exists.

I did not have this problem a week ago. :( I moved to ESM from Babel so I could get away from the utter insanity that is permanently-alpha transpiling and endlessly mangled line numbers, but alas, it found me here, too :(

[CodeOtter]

Aha! This is a problem between the interaction of nyc, esm, and ava

Going to close ticket, but leave it here in case some poor soul stumbles across this problem in the future!

[jdalton]

How did you solve the issue?

[CodeOtter]

I didn't and, instead, I've opened up a new request for #790 to allow user overrides of .terserrc to turn off compress and mangle