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system/Exceptions/DebugTraceableTrait.php

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+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Exceptions;
+
+use Throwable;
+
+/**
+ * This trait provides framework exceptions the ability to pinpoint
+ * accurately where the exception was raised rather than instantiated.
+ *
+ * This is used primarily for factory-instantiated exceptions.
+ */
+trait DebugTraceableTrait
+{
+    /**
+     * Tweaks the exception's constructor to assign the file/line to where
+     * it is actually raised rather than were it is instantiated.
+     */
+    final public function __construct(string $message = '', int $code = 0, ?Throwable $previous = null)
+    {
+        parent::__construct($message, $code, $previous);
+
+        $trace = $this->getTrace()[0];
+
+        if (isset($trace['class']) && $trace['class'] === static::class) {
+            [
+                'line' => $this->line,
+                'file' => $this->file,
+            ] = $trace;
+        }
+    }
+}