From f7811b927e9850cb0b922a325ee9b8d95377b54d Mon Sep 17 00:00:00 2001
From: Marco van 't Wout <marco@tremani.nl>
Date: Wed, 19 May 2021 11:12:21 +0200
Subject: [PATCH 1/3] Fix notice when handling c3 error before
 C3_CODECOVERAGE_MEDIATE_STORAGE is defined

---
 c3.php | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/c3.php b/c3.php
index 3c59a62..3116d44 100644
--- a/c3.php
+++ b/c3.php
@@ -38,9 +38,13 @@
 if (!function_exists('__c3_error')) {
     function __c3_error($message)
     {
-        $errorLogFile = defined('C3_CODECOVERAGE_ERROR_LOG_FILE') ?
-            C3_CODECOVERAGE_ERROR_LOG_FILE :
-            C3_CODECOVERAGE_MEDIATE_STORAGE . DIRECTORY_SEPARATOR . 'error.txt';
+        if (defined('C3_CODECOVERAGE_ERROR_LOG_FILE')) {
+            $errorLogFile = C3_CODECOVERAGE_ERROR_LOG_FILE;
+        } elseif (defined('C3_CODECOVERAGE_MEDIATE_STORAGE')) {
+            $errorLogFile = C3_CODECOVERAGE_MEDIATE_STORAGE . DIRECTORY_SEPARATOR . 'error.txt';
+        } else {
+            $errorLogFile = null;
+        }
         if (is_writable($errorLogFile)) {
             file_put_contents($errorLogFile, $message);
         } else {

From ca3b3de5cc4a169a1585a46c4ba6834c4d88852b Mon Sep 17 00:00:00 2001
From: Marco van 't Wout <marco@tremani.nl>
Date: Wed, 19 May 2021 11:26:40 +0200
Subject: [PATCH 2/3] Attempt to write error log file even if it doesn't exist
 yet

---
 c3.php | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/c3.php b/c3.php
index 3116d44..1deb124 100644
--- a/c3.php
+++ b/c3.php
@@ -45,11 +45,13 @@ function __c3_error($message)
         } else {
             $errorLogFile = null;
         }
-        if (is_writable($errorLogFile)) {
-            file_put_contents($errorLogFile, $message);
-        } else {
-            $message = "Could not write error to log file ($errorLogFile), original message: $message";
+
+        if (isset($errorLogFile)) {
+            if (@file_put_contents($errorLogFile, $message) === false) {
+                $message = "Could not write error to log file ($errorLogFile), original message: $message";
+            }
         }
+
         if (!headers_sent()) {
             header('X-Codeception-CodeCoverage-Error: ' . str_replace("\n", ' ', $message), true, 500);
         }

From 02e0cb743228af77bea2bd6a809a57b5cd9be8f7 Mon Sep 17 00:00:00 2001
From: Marco van 't Wout <marco@tremani.nl>
Date: Wed, 19 May 2021 11:34:18 +0200
Subject: [PATCH 3/3] Echo c3 error to screen and stop execution.

---
 c3.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/c3.php b/c3.php
index 1deb124..0ff4359 100644
--- a/c3.php
+++ b/c3.php
@@ -56,6 +56,9 @@ function __c3_error($message)
             header('X-Codeception-CodeCoverage-Error: ' . str_replace("\n", ' ', $message), true, 500);
         }
         setcookie('CODECEPTION_CODECOVERAGE_ERROR', $message);
+
+        echo 'CodeCeption C3 Error: ' . $message;
+        exit(1);
     }
 }