fix: bug where ExceptionHandler displays incorrect Exception classname

It showed the first Exception, but devs must catch the thrown Exception.

Author: kenjis

app/Controllers/Home.php

@@ -4,8 +4,10 @@
 
 class Home extends BaseController
 {
-    public function index(): string
+    public function index()
     {
-        return view('welcome_message');
+        $db      = db_connect();
+        $builder = $db->table('test');
+        $builder->insert(['id' => 1, 'c1' => 'foo']);
     }
 }

system/Debug/BaseExceptionHandler.php

@@ -67,7 +67,14 @@ abstract public function handle(
      */
     protected function collectVars(Throwable $exception, int $statusCode): array
     {
-        $trace = $exception->getTrace();
+        // Get the first exception.
+        $firstException = $exception;
+
+        while ($prevException = $firstException->getPrevious()) {
+            $firstException = $prevException;
+        }
+
+        $trace = $firstException->getTrace();
 
         if ($this->config->sensitiveDataInTrace !== []) {
             $trace = $this->maskSensitiveData($trace, $this->config->sensitiveDataInTrace);

system/Debug/Exceptions.php

@@ -136,11 +136,6 @@ public function exceptionHandler(Throwable $exception)
         $this->request  = Services::request();
         $this->response = Services::response();
 
-        // Get the first exception.
-        while ($prevException = $exception->getPrevious()) {
-            $exception = $prevException;
-        }
-
         if (method_exists($this->config, 'handler')) {
             // Use new ExceptionHandler
             $handler = $this->config->handler($statusCode, $exception);
@@ -325,7 +320,14 @@ protected function render(Throwable $exception, int $statusCode)
      */
     protected function collectVars(Throwable $exception, int $statusCode): array
     {
-        $trace = $exception->getTrace();
+        // Get the first exception.
+        $firstException = $exception;
+
+        while ($prevException = $firstException->getPrevious()) {
+            $firstException = $prevException;
+        }
+
+        $trace = $firstException->getTrace();
 
         if ($this->config->sensitiveDataInTrace !== []) {
             $trace = $this->maskSensitiveData($trace, $this->config->sensitiveDataInTrace);