Spamassasin's cron: lint check of update failed

[binarykitchen]

Just got this error notification for first time. Using latest version of mailinabox, running on latest Ubuntu:

/etc/cron.daily/spamassassin:
config: invalid regexp for __URI_TRY_3LD 'm,^https?://(?:try(?!r\.codeschool)|start|get(?!\.adobe)|save|check(?!out)|act|compare|join|learn(?!ing)|request|visit(?!or|\.vermont)|my(?!sub|turbotax|news\.apple|a\.godaddy|account|support|build|blob)\w)[^.]*\.[^/]+\.(?<!list-manage\.)(?:com|net)\b,i': Variable length lookbehind not implemented in regex m/(?i)^https?://(?:try(?!r\.codeschool)|start|get(?!\.adobe)|save|check(?!out)|act|compare|join|learn(?!ing)|request|vi.../
channel: lint check of update failed, channel failed
sa-update failed for unknown reasons

[durd]

Second day in a row for me. Haven't googled much yet.

[jvolkenant]

https://bz.apache.org/SpamAssassin/show_bug.cgi?id=7956

[durd]

Today there is no error, even running /etc/cron.daily/spamassassin manually as root.