Issue #2646 has been updated by Yui NARUSE. Hmm, it seems your clang's bug. I can compile with clang 1.1 with x86_64 FreeBSD. Anyway, it seems crash of miniruby. Can you try following? gdb ./miniruby -e'1' ---------------------------------------- http://redmine.ruby-lang.org/issues/show/2646 ---------------------------------------- http://redmine.ruby-lang.org