From ce544b23e69b59757d1fe5031cb6be8b637c66b8 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Mon, 14 Sep 2009 23:01:49 +0000
Subject: [PATCH] Try to catch some NaNs that are almost certainly a compiler
 optimization bug.

  Fixes Bugzilla #2998.
---
 code/renderer/tr_scene.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/code/renderer/tr_scene.c b/code/renderer/tr_scene.c
index 4802bcb1..dc76e0e9 100644
--- a/code/renderer/tr_scene.c
+++ b/code/renderer/tr_scene.c
@@ -211,6 +211,14 @@ void RE_AddRefEntityToScene( const refEntity_t *ent ) {
 	if ( r_numentities >= MAX_ENTITIES ) {
 		return;
 	}
+	if ( Q_isnan(ent->origin[0]) || Q_isnan(ent->origin[1]) || Q_isnan(ent->origin[2]) ) {
+		static qboolean first_time = qtrue;
+		if (first_time) {
+			first_time = qfalse;
+			Com_Printf(S_COLOR_YELLOW "WARNING: You might have built ioquake3 with a buggy compiler!\n");
+		}
+		return;
+	}
 	if ( ent->reType < 0 || ent->reType >= RT_MAX_REF_ENTITY_TYPE ) {
 		ri.Error( ERR_DROP, "RE_AddRefEntityToScene: bad reType %i", ent->reType );
 	}