Land rapid7#16058, fix stack trace in local_exploit_suggester when se…

…ssion is invalid

modules/post/multi/recon/local_exploit_suggester.rb

@@ -85,10 +85,12 @@ def is_module_wanted?(mod)
   end
 
   def setup
+    return unless session
+
     print_status "Collecting local exploits for #{session.session_type}..."
-    # Initializes an array
-    @local_exploits = []
+
     # Collects exploits into an array
+    @local_exploits = []
     framework.exploits.each do |name, _obj|
       mod = framework.exploits.create name
       next unless mod
@@ -167,14 +169,14 @@ def is_check_interesting?(checkcode)
   end
 
   def print_status(msg='')
-    super("#{session.session_host} - #{msg}")
+    super(session ? "#{session.session_host} - #{msg}" : msg)
   end
 
   def print_good(msg='')
-    super("#{session.session_host} - #{msg}")
+    super(session ? "#{session.session_host} - #{msg}" : msg)
   end
 
   def print_error(msg='')
-    super("#{session.session_host} - #{msg}")
+    super(session ? "#{session.session_host} - #{msg}" : msg)
   end
 end