From 5b761d0186c102c655ede0c7f400ac71c1a5de5f Mon Sep 17 00:00:00 2001
From: moneromooo-monero <moneromooo-monero@users.noreply.github.com>
Date: Wed, 29 Jul 2020 17:03:21 +0000
Subject: [PATCH] easylogging++: fix crash with reentrant logging

---
 external/easylogging++/easylogging++.cc | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/external/easylogging++/easylogging++.cc b/external/easylogging++/easylogging++.cc
index 0d748c225..bf877c018 100644
--- a/external/easylogging++/easylogging++.cc
+++ b/external/easylogging++/easylogging++.cc
@@ -2968,6 +2968,16 @@ void Writer::initializeLogger(Logger *logger, bool needLock) {
 }
 
 void Writer::processDispatch() {
+  static std::atomic_flag in_dispatch;
+  if (in_dispatch.test_and_set())
+  {
+    if (m_proceed && m_logger != NULL)
+    {
+      m_logger->stream().str(ELPP_LITERAL(""));
+      m_logger->releaseLock();
+    }
+    return;
+  }
 #if ELPP_LOGGING_ENABLED
   if (ELPP->hasFlag(LoggingFlag::MultiLoggerSupport)) {
     bool firstDispatched = false;
@@ -3006,6 +3016,7 @@ void Writer::processDispatch() {
     m_logger->releaseLock();
   }
 #endif // ELPP_LOGGING_ENABLED
+  in_dispatch.clear();
 }
 
 void Writer::triggerDispatch(void) {