From ac47166894a9eb7d6281eb9d067c2fd0891b8c31 Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sun, 4 Mar 2018 15:11:45 +0200
Subject: [PATCH] Fixed freeze after saving game when cl_waitforsave CVAR set
 to false

Restored assertions that help to spot incorrect usage of I_FreezeTime() function
https://forum.zdoom.org/viewtopic.php?t=59672
---
 src/g_game.cpp | 4 +++-
 src/i_time.cpp | 2 ++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/g_game.cpp b/src/g_game.cpp
index d0cf74be7..2ca349631 100644
--- a/src/g_game.cpp
+++ b/src/g_game.cpp
@@ -2388,7 +2388,9 @@ void G_DoSaveGame (bool okForQuicksave, FString filename, const char *descriptio
 	level.info->Snapshot.Clean();
 		
 	insave = false;
-	I_FreezeTime(false);
+
+	if (cl_waitforsave)
+		I_FreezeTime(false);
 }
 
 
diff --git a/src/i_time.cpp b/src/i_time.cpp
index 29119ddb4..8fd058723 100644
--- a/src/i_time.cpp
+++ b/src/i_time.cpp
@@ -187,10 +187,12 @@ void I_FreezeTime(bool frozen)
 {
 	if (frozen)
 	{
+		assert(FreezeTime == 0);
 		FreezeTime = GetClockTimeNS();
 	}
 	else
 	{
+		assert(FreezeTime != 0);
 		FirstFrameStartTime += GetClockTimeNS() - FreezeTime;
 		FreezeTime = 0;
 		I_SetFrameTime();