[racket-dev] Segfault on HEAD?

Hi all,

I get a reproducible segfault when I built Racket from git HEAD. This is
what I see:

raco setup: 7 making: redex/examples (Reduction Semantics examples)
reverse: contract violation
  expected: list?
  given: 4193052015854236082

SIGSEGV SI_KERNEL SI_CODE 128 fault on addr (nil) sent by kernel
Aborted
make[1]: *** [install-3m] Error 134
make[1]: Leaving directory `/home/asumu/plt/racket-git-segfault/src/build'
make: *** [install] Error 2

It always seems to segfault at that point in the build. I'm building a
fresh copy of the tree, so it's not a stale zo problem or anything.

Anything I can do to diagnose?

Cheers,
Asumu