Privoxy version: 3.0.21
Operating system: Windows 7 SP1 64-bit
Using a minimal configuration and a single actions file rule with backreferencing:
Privoxy hangs when trying to access a matching URL ( http://example/aa ) or the Privoxy URL lookup page for a matching URL. Attached are the config used, sample actions file and log files. I have also generated a crash dump of the process which can be supplied if it will be helpful.