when building dub (2e1f98ac… Jun,12) with current gdc (11867844… Jun,14) i got
ICE:

source/dub/dub.d: In member function 'getAllConfigs':
source/dub/dub.d:723: error: insn does not satisfy its constraints:
(insn 953 283 284 16 (set (reg:DI 4 si)
        (reg:DI 21 xmm0)) 82 {*movdi_internal}
     (expr_list:REG_UNUSED (reg:SI 5 di)
        (nil)))
source/dub/dub.d:723: internal compiler error: in copyprop_hardreg_forward_1,
at regcprop.c:776

build flags: -O2 -march=core2 -mtune=core2 -frelease

not sure if it's bug in gdc or in gcc though, 'cause it works with "-O2
-march=i686 -mtune=i686 -frelease"

probably it's gcc 4.10 bug, and i can't test gdc 4.9, 'cause recent fixes not
yet backported to it.