From 8330f26958a80a3580f51e18da934a68fe948cf7 Mon Sep 17 00:00:00 2001
From: Dieter Holvoet <dieter.holvoet@gmail.com>
Date: Sun, 21 Aug 2022 13:47:30 +0200
Subject: [PATCH] Exclude non-placeholder variables

---
 src/Drupal/Commands/core/DeployHookCommands.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Drupal/Commands/core/DeployHookCommands.php b/src/Drupal/Commands/core/DeployHookCommands.php
index 9bcbb0a761..746ec095fe 100644
--- a/src/Drupal/Commands/core/DeployHookCommands.php
+++ b/src/Drupal/Commands/core/DeployHookCommands.php
@@ -194,7 +194,9 @@ public static function updateDoOneDeployHook(string $function, DrushBatchContext
                 Drush::logger()->error($e->getMessage());
 
                 $variables = Error::decodeException($e);
-                unset($variables['backtrace']);
+                $variables = array_filter($variables, function ($key) {
+                    return $key[0] == '@' || $key[0] == '%';
+                }, ARRAY_FILTER_USE_KEY);
                 // On windows there is a problem with json encoding a string with backslashes.
                 $variables['%file'] = strtr($variables['%file'], [DIRECTORY_SEPARATOR => '/']);
                 $ret['#abort'] = [