From 788620866d01012cc2528cc0e880ba2a0c1036b7 Mon Sep 17 00:00:00 2001
From: anders_k <anders_k@212acab6-be3b-0410-9dea-997c60f758d6>
Date: Tue, 12 Feb 2019 00:05:28 +0000
Subject: [PATCH] Fixed -O double fclose (bug #1221)

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@7083 212acab6-be3b-0410-9dea-997c60f758d6
---
 Docs/src/history.but | 2 ++
 Source/makenssi.cpp  | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Docs/src/history.but b/Docs/src/history.but
index ae79ae22..99aa79b0 100644
--- a/Docs/src/history.but
+++ b/Docs/src/history.but
@@ -16,6 +16,8 @@ ANSI targets are deprecated, consider moving to Unicode.
 
 \b Added \R{loadandsetimage}{LoadAndSetImage}
 
+\b Fixed -O stderr stream issue (\W{http://sf.net/p/nsis/bugs/1221}{bug #1221})
+
 \S2{} Translations
 
 \b Updated Hindi (\W{http://sf.net/p/nsis/patches/291}{patch #291}) and Portuguese (\W{http://sf.net/p/nsis/bugs/1219}{bug #1219})
diff --git a/Source/makenssi.cpp b/Source/makenssi.cpp
index 4afb860c..813adb09 100644
--- a/Source/makenssi.cpp
+++ b/Source/makenssi.cpp
@@ -70,8 +70,10 @@ static void myatexit()
 {
   dopause();
   ResetPrintColor();
-  if (g_output != stdout && g_output) fclose(g_output), g_output = 0;
-  if (g_errout != stderr && g_errout) fclose(g_errout), g_errout = 0;
+  bool oneoutputstream = g_output == g_errout;
+  if (g_output != stdout && g_output                    ) fclose(g_output);
+  if (g_errout != stderr && g_errout && !oneoutputstream) fclose(g_errout);
+  g_output = g_errout = 0;
 #ifdef _WIN32
   SetConsoleOutputCP(g_wincon_orgoutcp);
 #endif