With an exception for lexicals with a reference count of > 1, to cope with the
implementation of ?{{ ... }} blocks in regexps. :-(
-commit 4cee4ca8b28e9dadc530df8ce100439bc4a78e73
+commit 4cee4ca8b28e9dadc530df8ce100439bc4a78e73 # NODOC
Author: Nicholas Clark <nick@ccl4.org>
Date: Thu Feb 25 16:56:53 2010 +0000