From 097be4c012ba4618b4faf1054a864cab16d749cf Mon Sep 17 00:00:00 2001
From: Riyyi <riyyi3@gmail.com>
Date: Sun, 10 Jul 2022 21:42:48 +0200
Subject: [PATCH] Util: Fix Serializer trailing commas in Object dumping

The .end() returns an iterator one past the last pair, so it would
always add a comma after the last member.
---
 src/util/json/serializer.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/util/json/serializer.cpp b/src/util/json/serializer.cpp
index ae56d58..e724529 100644
--- a/src/util/json/serializer.cpp
+++ b/src/util/json/serializer.cpp
@@ -5,6 +5,7 @@
  */
 
 #include <cstdint>  // uint32_t
+#include <iterator> // prev
 #include <sstream>  // ostringstream
 #include <string>
 
@@ -119,7 +120,7 @@ std::string Serializer::dumpObject(const Value& value, const uint32_t indentLeve
 		result += dumpHelper(it->second, indentLevel + 1);
 
 		// Add comma, except after the last element
-		if (it != members.end()) {
+		if (it != std::prev(members.end(), 1)) {
 			result += ",";
 		}
 		if (m_indent > 0) {