From fc5149a1c761f279eddec607a66c071d0a85c929 Mon Sep 17 00:00:00 2001
From: Nicholas Hastings <nshastings@gmail.com>
Date: Tue, 10 Mar 2015 18:57:28 -0700
Subject: [PATCH] Throw an error if DirExists called with empty path.

---
 core/logic/smn_filesystem.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/core/logic/smn_filesystem.cpp b/core/logic/smn_filesystem.cpp
index 692edc0e..14ad3161 100644
--- a/core/logic/smn_filesystem.cpp
+++ b/core/logic/smn_filesystem.cpp
@@ -616,7 +616,12 @@ static cell_t sm_DirExists(IPluginContext *pContext, const cell_t *params)
 {
 	char *name;
 	pContext->LocalToString(params[1], &name);
-	
+
+	if (!name[0])
+	{
+		return pContext->ThrowNativeError("Invalid path. An empty path string is not valid, use "." to refer to the current working directory.");
+	}
+
 	if (params[0] >= 2 && params[2] == 1)
 	{
 		char *pathID;