Add logging in case of exceptions during rm

Author: egypt

lib/msf/core/exploit/file_dropper.rb

@@ -56,7 +56,7 @@ def on_new_session(session)
 	#
 	# Record file as needing to be cleaned up
 	#
-	# @param [Array<String>] files List of paths on the target that should
+	# @param files [Array<String>] List of paths on the target that should
 	#   be deleted during cleanup. Each filename should be either a full
 	#   path or relative to the current working directory of the session
 	#   (not necessarily the same as the cwd of the server we're
@@ -95,7 +95,9 @@ def cleanup
 					true
 				#rescue ::Rex::SocketError, ::EOFError, ::IOError, ::Errno::EPIPE, ::Rex::Post::Meterpreter::RequestError => e
 				rescue ::Exception => e
-					vprint_error("Failed to delete #{file}: #{e.to_s}")
+					vprint_error("Failed to delete #{file}: #{e}")
+					elog("Failed to delete #{file}: #{e.class}: #{e}")
+					elog("Call stack:\n#{e.backtrace.join("\n")}")
 					false
 				end
 			end