Any on how to find out where it is broken and maybe even why?  (bug in
ruby? bug in clang?)

clang/llvm 1.1@97037, ruby@26766, OS X 10.6.2.

clang -O -m64 -g -pipe -L. -m64 -g -L/usr/local/lib -Wl,-u,_objc_msgSend
main.o dmydln.o dmyencoding.o dmyversion.o miniprelude.o array.o
bignum.o class.o compar.o complex.o dir.o dln_find.o enum.o enumerator.o
error.o eval.o load.o proc.o file.o gc.o hash.o inits.o io.o marshal.o
math.o node.o numeric.o object.o pack.o parse.o process.o random.o
range.o rational.o re.o regcomp.o regenc.o regerror.o regexec.o
regparse.o regsyntax.o ruby.o safe.o signal.o sprintf.o st.o strftime.o
string.o struct.o time.o transcode.o util.o variable.o compile.o debug.o
iseq.o vm.o vm_dump.o thread.o cont.o ascii.o us_ascii.o unicode.o
utf_8.o newline.o  dmyext.o -lpthread -ldl -lobjc  -o miniruby
<internal:prelude>:4: [BUG] Segmentation fault
ruby 1.9.2dev (2010-02-26) [x86_64-darwin10.2.0]

-- control frame ----------
c:0003 p:0002 s:0006 b:0006 l:000005 d:000005 TOP
<internal:prelude>:4
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:0006d8 d:0006d8 TOP
---------------------------
-- Ruby level backtrace information
----------------------------------------
<internal:prelude>:4:in `<compiled>'

-- C level backtrace information
-------------------------------------------

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