lang/ruby18 fails with [BUG] error

[Sevan / Venture37]

Hi,
Im trying to build lang/ruby18 on freebsd-head but Im receiving an error
./lib/fileutils.rb:1430: [BUG] unexpected local variable
ruby 1.8.7 (2012-02-08 patchlevel 358) [amd-freebsd10]

*** [./.rbconfig.time] Signal 6

System is currently running r235439M userland built with WITH_CLANG_IS_CC 


Sevan / Venture37