From 34c0536a7ee00a14d96d9ec0270497cc1eeb3fa5 Mon Sep 17 00:00:00 2001
From: Athanasius <github@miggy.org>
Date: Mon, 22 Mar 2021 11:43:44 +0000
Subject: [PATCH] Paranoia check in sendreplay().

See #926
---
 plugins/eddn.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/plugins/eddn.py b/plugins/eddn.py
index 1197b628..246d7b1d 100644
--- a/plugins/eddn.py
+++ b/plugins/eddn.py
@@ -6,6 +6,7 @@ import pathlib
 import re
 import sys
 import tkinter as tk
+import traceback
 from collections import OrderedDict
 from os import SEEK_SET
 from os.path import join
@@ -184,6 +185,12 @@ Msg:\n{msg}'''
 
         self.parent.update_idletasks()
 
+        # Paranoia check in case this function gets chain-called.
+        if not self.replaylog:
+            logger.error('self.replaylog is False after update_idletasks().  Traceback:\n'
+                         f'{"".join(traceback.format_list(traceback.extract_stack()))}')
+            return
+
         try:
             cmdr, msg = json.loads(self.replaylog[0], object_pairs_hook=OrderedDict)