[racket-dev] seeing segfaults on build on 64-bit ubuntu

I'm seeing segfaults when trying to build the release on my uber
64-bit Ubuntu box.  (I'm on c9d0319a11cb2aae6d1e81d0c6465b4241a4ecff)


raco setup: 2 running: picturing-programs/picturing-programs.scrbl
raco setup: 1 running: plai/scribblings/plai.scrbl
raco setup: 2 running: planet/planet.scrbl
raco setup: 1 running: plot/scribblings/plot.scrbl
raco setup: 2 running: preprocessor/scribblings/preprocessor.scrbl
raco setup: 2 running: scribblings/quick/quick.scrbl
raco setup: 2 running: r5rs/r5rs.scrbl
Seg fault (internal error) at 0x2adfc19cb850
SIGSEGV SEGV_ACCERR SI_CODE 2 fault on 0x2adfc19cb850
Seg fault (internal error) at 0x2adfe25045a0
SIGSEGV SEGV_ACCERR SI_CODE 2 fault on 0x2adfe25045a0
Aborted (core dumped)
make[1]: *** [install-3m] Error 134
make[1]: Leaving directory `/home/dyoo/local/racket/src/build'



What can I do to help provide more debugging info?