@babel/preset-env: `DEBUG` option

Using targets:
{
  "node": "6"
}

Using modules transform: auto

Using plugins:
  proposal-numeric-separator { "node":"6" }
  proposal-logical-assignment-operators { "node":"6" }
  proposal-nullish-coalescing-operator { "node":"6" }
  proposal-optional-chaining { "node":"6" }
  proposal-json-strings { "node":"6" }
  proposal-optional-catch-binding { "node":"6" }
  proposal-async-generator-functions { "node":"6" }
  proposal-object-rest-spread { "node":"6" }
  transform-dotall-regex { "node":"6" }
  proposal-unicode-property-regex { "node":"6" }
  transform-named-capturing-groups-regex { "node":"6" }
  transform-async-to-generator { "node":"6" }
  transform-exponentiation-operator { "node":"6" }
  transform-function-name { "node":"6" }
  transform-for-of { "node":"6" }
  transform-destructuring { "node":"6" }
  proposal-export-namespace-from { "node":"6" }
  transform-modules-commonjs { "node":"6" }
  proposal-dynamic-import { "node":"6" }

Using polyfills with `entry` option:

[<CWD>/packages/babel-preset-env/test/fixtures/debug/entry-corejs3-no-import/input.js] Import of core-js was not found.
