MachRegs.lhs:563: Non-exhaustive patterns in function baseRegOffset

[Byron Cook]

Hi, when running GHC 4.00 on a solaris machine
(SunOS lassi 5.5.1 Generic_103640-03 sun4u sparc SUNW,Ultra-1)

i get the following error:
MachRegs.lhs:563: Non-exhaustive patterns in function baseRegOffset

(MachRegs.lhs is GHC's file, not the one im trying to compile)

the arguments i passed to GHC are -fglasgow-exts and -H10m

By the way, this doesnt happen when using GHC 4.00 with Linux-x86