From 9fc726619a182744362f07ff4f51b7660133c4d4 Mon Sep 17 00:00:00 2001
From: daan <daanl@outlook.com>
Date: Fri, 30 Aug 2019 14:37:04 -0700
Subject: [PATCH] guard against passing stdin/stderr as output

---
 src/options.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/options.c b/src/options.c
index 06d876fc..ff0c4e03 100644
--- a/src/options.c
+++ b/src/options.c
@@ -150,6 +150,7 @@ static void mi_out_stderr(const char* msg) {
 // Default output handler
 // --------------------------------------------------------
 
+#pragma warning(suppress:4180)
 static volatile _Atomic(mi_output_fun*) mi_out_default; // = NULL
 
 static mi_output_fun* mi_out_get_default(void) {
@@ -179,7 +180,7 @@ static void mi_vfprintf( mi_output_fun* out, const char* prefix, const char* fmt
   if (fmt==NULL) return;
   if (_mi_preloading() || recurse) return;
   recurse = true;
-  if (out==NULL) out = mi_out_get_default();
+  if (out==NULL || (FILE*)out==stdout || (FILE*)out==stderr) out = mi_out_get_default();
   vsnprintf(buf,sizeof(buf)-1,fmt,args);
   if (prefix != NULL) out(prefix);
   out(buf);