From 76e8e8f6c7681f61566ca1956cba20f69107c7bb Mon Sep 17 00:00:00 2001
From: Brent Cook <bcook@rapid7.com>
Date: Mon, 23 May 2016 20:08:38 -0500
Subject: [PATCH] really fix regex

---
 lib/msf/core/opt_regexp.rb | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib/msf/core/opt_regexp.rb b/lib/msf/core/opt_regexp.rb
index f8bcf4c307..17d32dbb17 100644
--- a/lib/msf/core/opt_regexp.rb
+++ b/lib/msf/core/opt_regexp.rb
@@ -13,11 +13,15 @@ class OptRegexp < OptBase
   end
 
   def valid?(value, check_empty: true)
-    return false if check_empty && empty_required_value?(value)
+    if check_empty && empty_required_value?(value)
+      return false
+    elsif value.nil?
+      return true
+    end
 
     begin
       Regexp.compile(value)
-      return true
+      return super
     rescue RegexpError, TypeError
       return false
     end