ACPT-1587

For exceptions of type GraphQL\Error\Error, use previous exception if available.

Otherwise, the stack trace that shows up in New Relic is not that useful because New Relic doesn't show the previous exception's stack trace.

Author: JacobBrownAustin

app/code/Magento/GraphQlNewRelic/Plugin/ReportError.php

@@ -35,7 +35,11 @@ public function __construct(private NewRelicWrapper $newRelicWrapper)
     public function beforeHandle(ErrorHandler $subject, array $errors, callable $formatter)
     {
         if (!empty($errors)) {
-            $this->newRelicWrapper->reportError($errors[0]); // Note: We only log the first error because performance
+            $error = $errors[0];
+            if (($error instanceof Error ) && $error->getPrevious()) {
+                $error = $error->getPrevious();
+            }
+            $this->newRelicWrapper->reportError($error); // Note: We only log the first error because performance
         }
         return null;
     }