Node.js 6 global console scope issue

00-README.md

Node.js 6 global console scope issue

The assignment to console.debug on console-scope-test.js:13 seems to be overriding the assignment on console-scope-test2.js:9, but the strict-equals assertions seem inconsistent.

Run:

NODE_DEBUG=scope1,scope2 node console-scope-test.js

Outputs:

LOAD scope1
LOAD scope2
SCOPE1 8060: Starting the main (scope1)...
SCOPE1 8060: Starting some fake work (scope2)...
SCOPE1 8060: Finished some fake work (scope2).
SCOPE1 8060: Finished in main (scope1).

console-scope-test.js

'use strict';
process.stdout.write('LOAD scope1\n');

const assert = require('assert'),
      console = require('console'),
      util = require('util'),
      scope2 = require('./console-scope-test2');

assert.deepStrictEqual(console, scope2.console);
assert.strictEqual(console.debug, scope2.console.debug);
assert.strictEqual(console.debug, scope2.debug);

console.debug = util.debuglog('scope1');

assert.deepStrictEqual(console, scope2.console);
assert.strictEqual(console.debug, scope2.console.debug);
assert.notStrictEqual(console.debug, scope2.debug); // ??? - Why does this pass when the previous line passes?

function main() {
  console.debug('Starting the main (scope1)...');
  
  scope2.fakeWork(() => {
    assert.deepStrictEqual(console, scope2.console);
    assert.strictEqual(console.debug, scope2.console.debug);
    assert.notStrictEqual(console.debug, scope2.debug); // ??? - Why does this pass when the previous line passes?
    
    console.debug('Finished in main (scope1).');
  });
}

main();

assert.deepStrictEqual(console, scope2.console);
assert.strictEqual(console.debug, scope2.console.debug);
assert.notStrictEqual(console.debug, scope2.debug); // ??? - Why does this pass when the previous line passes?

console-scope-test2.js

'use strict';
process.stdout.write('LOAD scope2\n');

const console = require('console'),
      util = require('util');

exports.console = console;

console.debug = util.debuglog('scope2');
exports.debug = console.debug;

exports.fakeWork = function fakeWork(callback) {
  console.debug('Starting some fake work (scope2)...'); // ??? - outputs with SCOPE1 prefix

  setTimeout(() => {
    console.debug('Finished some fake work (scope2).'); // ??? - outputs with SCOPE1 prefix
    process.nextTick(callback);
  }, 500);
};