Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/phpunit/php-code-coverage/src/CodeCoverage/Driver/Xdebug.php

@@ -0,0 +1,97 @@
+<?php
+/*
+ * This file is part of the PHP_CodeCoverage package.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Driver for Xdebug's code coverage functionality.
+ *
+ * @since Class available since Release 1.0.0
+ * @codeCoverageIgnore
+ */
+class PHP_CodeCoverage_Driver_Xdebug implements PHP_CodeCoverage_Driver
+{
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        if (!extension_loaded('xdebug')) {
+            throw new PHP_CodeCoverage_Exception('This driver requires Xdebug');
+        }
+
+        if (version_compare(phpversion('xdebug'), '2.2.0-dev', '>=') &&
+            !ini_get('xdebug.coverage_enable')) {
+            throw new PHP_CodeCoverage_Exception(
+                'xdebug.coverage_enable=On has to be set in php.ini'
+            );
+        }
+    }
+
+    /**
+     * Start collection of code coverage information.
+     */
+    public function start()
+    {
+        xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
+    }
+
+    /**
+     * Stop collection of code coverage information.
+     *
+     * @return array
+     */
+    public function stop()
+    {
+        $data = xdebug_get_code_coverage();
+        xdebug_stop_code_coverage();
+
+        return $this->cleanup($data);
+    }
+
+    /**
+     * @param  array $data
+     * @return array
+     * @since Method available since Release 2.0.0
+     */
+    private function cleanup(array $data)
+    {
+        foreach (array_keys($data) as $file) {
+            unset($data[$file][0]);
+
+            if ($file != 'xdebug://debug-eval' && file_exists($file)) {
+                $numLines = $this->getNumberOfLinesInFile($file);
+
+                foreach (array_keys($data[$file]) as $line) {
+                    if (isset($data[$file][$line]) && $line > $numLines) {
+                        unset($data[$file][$line]);
+                    }
+                }
+            }
+        }
+
+        return $data;
+    }
+
+    /**
+     * @param  string $file
+     * @return int
+     * @since Method available since Release 2.0.0
+     */
+    private function getNumberOfLinesInFile($file)
+    {
+        $buffer = file_get_contents($file);
+        $lines  = substr_count($buffer, "\n");
+
+        if (substr($buffer, -1) !== "\n") {
+            $lines++;
+        }
+
+        return $lines;
+    }
+}