From cffc6d5bc40bb895eb60c8307df79c18fab18ac7 Mon Sep 17 00:00:00 2001
From: Tanay Soni <tanaysoni12@gmail.com>
Date: Wed, 14 Oct 2020 11:26:54 +0200
Subject: [PATCH] deepcopy meta dicts in answers

---
 haystack/finder.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/haystack/finder.py b/haystack/finder.py
index c2d54776c3..4ead6911c7 100644
--- a/haystack/finder.py
+++ b/haystack/finder.py
@@ -1,5 +1,6 @@
 import logging
 import time
+from copy import deepcopy
 from statistics import mean
 from typing import Optional, Dict, Any, List
 from collections import defaultdict
@@ -69,7 +70,7 @@ def get_answers(self, question: str, top_k_reader: int = 1, top_k_retriever: int
             ans["meta"] = {}
             for doc in documents:
                 if doc.id == ans["document_id"]:
-                    ans["meta"] = doc.meta
+                    ans["meta"] = deepcopy(doc.meta)
 
         return results