Hi,

filtermail 1.07.01-1 was built against bobcat 6.11 and fails to start
with libbobcat6 6.15, which no longer exports
FBB::Pattern::operator=(FBB::Pattern&&)

Refer to Debian #1150139 [1]

A rebuild fixes it and no other reverse dependency of libbobcat6 is affected.
bobcat 6.15.01-3 adds Breaks: filtermail (<< 1.07.01-1+b1).

nmu filtermail_1.07.01-1 . ANY . unstable . -m "Rebuild against libbobcat6 6.15 (#1150139)"

Thanks,
tony

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1150139