From abf7278f0ceda184806eb6b97da501a6d6b29c07 Mon Sep 17 00:00:00 2001
From: David Barri <japgolly@gmail.com>
Date: Tue, 9 Jun 2020 21:04:06 +1000
Subject: [PATCH] Set console.error to console.log if unset

---
 .../main/scala/org/scalajs/jsenv/phantomjs/PhantomJSEnv.scala   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/phantomjs-env/src/main/scala/org/scalajs/jsenv/phantomjs/PhantomJSEnv.scala b/phantomjs-env/src/main/scala/org/scalajs/jsenv/phantomjs/PhantomJSEnv.scala
index 3b8628dc0..152c828db 100644
--- a/phantomjs-env/src/main/scala/org/scalajs/jsenv/phantomjs/PhantomJSEnv.scala
+++ b/phantomjs-env/src/main/scala/org/scalajs/jsenv/phantomjs/PhantomJSEnv.scala
@@ -133,6 +133,8 @@ final class PhantomJSEnv(config: PhantomJSEnv.Config) extends JSEnv {
     try {
       out.write(
           s"""// Scala.js Phantom.js launcher
+             |if (!console.error)
+             |  console.error = console.log;
              |var page = require('webpage').create();
              |var url = "${escapeJS(fixFileURI(webF.toURI).toASCIIString)}";
              |page.onConsoleMessage = function(msg) {