From 37559fee214839d08633b73799bd7c60cec16b70 Mon Sep 17 00:00:00 2001
From: mfranz <mfranz>
Date: Thu, 19 Jun 2008 10:39:12 +0000
Subject: [PATCH] make fgfs abort() after a listener with runtime arg == -1 was
 triggered and its function called. This is useful for debugging purposes, to
 get a core dump which unveils which C++ code was writing to the property.
 This isn't any more of a security problem as other Nasal code that makes fgfs
 crash, such as:  var x = func call(x); x();  The difference is that the
 listener doesn't use up all memory before and is much quicker.

---
 src/Scripting/NasalSys.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/Scripting/NasalSys.cxx b/src/Scripting/NasalSys.cxx
index 84429c700..a37c40b35 100644
--- a/src/Scripting/NasalSys.cxx
+++ b/src/Scripting/NasalSys.cxx
@@ -1023,6 +1023,7 @@ void FGNasalListener::valueChanged(SGPropertyNode* node)
     if(_type < 2 && node != _node) return;   // skip child events
     if(_type > 0 || changed(_node) || _first_call)
         call(node, naNum(0));
+    if(_type == -1) abort();
 
     _first_call = false;
 }