0.12.6beta1: handle an exception while executing processor block (fixed #11735)


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/0.12-stable@13104 af82e41b-90c4-0310-8c96-b1721e28e2e2
1.0.2beta1: merged [13104] from 0.12-stable (fix for #11735)


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/1.0-stable@13105 af82e41b-90c4-0310-8c96-b1721e28e2e2