console.error messages caught by onConsoleMessage rather than onError

[jgor]

The snippet below behaves differently under phantomjs v2.1.1 in the Ubuntu / Debian repositories vs downloading the binary directly from the website and I'm not sure why. Observed on Ubuntu 17.04 and Debian 9.2.1.

Expectation: error messages on the page are caught by onError handler
Reality: error messages are caught by onConsoleMessage instead

Steps to reproduce:

1. $ apt install phantomjs
2. download phantomjs binary from http://phantomjs.org
3. run test.js with both versions and get different outputs

Example:

jgor@ubuntu:~$ cat test.js
var page = require('webpage').create();
page.onConsoleMessage = function(msg) { console.log('Log: ' + msg); }
page.onError = function(msg) { console.log('Error: ' + msg); }
page.open("about:blank", function() {
        page.evaluate(function() {
            console.log('log message');
            console.error('error message');
        });
        phantom.exit();
});

jgor@ubuntu:~$ /usr/bin/phantomjs test.js
Log: log message
Log: error message

jgor@ubuntu:~$ phantomjs-2.1.1-linux-x86_64/bin/phantomjs test.js
Log: log message
Error: error message

jgor@ubuntu:~$ /usr/bin/phantomjs -v
2.1.1

jgor@ubuntu:~$ phantomjs-2.1.1-linux-x86_64/bin/phantomjs -v
2.1.1

[stale]

Due to our very limited maintenance capacity, we need to prioritize our development focus on other tasks. Therefore, this issue will be automatically closed (see #15395 for more details). In the future, if we see the need to attend to this issue again, then it will be reopened. Thank you for your contribution!