From 6d45a22ba4cead02ff4cc0b914619483e0a25062 Mon Sep 17 00:00:00 2001
From: Daniel Tschinder <daniel.tschinder@researchgate.net>
Date: Tue, 13 Feb 2018 10:41:04 +0100
Subject: [PATCH] Always extract extensions from the original error if possible

ref: graphql/graphql-js#2d08496720088dbe65ebea312c8526bd48fb8ee8
---
 src/Error/Error.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Error/Error.php b/src/Error/Error.php
index 3694592..ac931bf 100644
--- a/src/Error/Error.php
+++ b/src/Error/Error.php
@@ -173,7 +173,11 @@ class Error extends \Exception implements \JsonSerializable, ClientAware
         $this->source = $source;
         $this->positions = $positions;
         $this->path = $path;
-        $this->extensions = $extensions;
+        $this->extensions = $extensions ?: (
+            $previous && $previous instanceof self
+                ? $previous->extensions
+                : []
+        );
 
         if ($previous instanceof ClientAware) {
             $this->isClientSafe = $previous->isClientSafe();