compiler internal error

[Simon Chu]

class SDF {
      class HEADER;
      class ELEMENT;
      class INFO;
      class VALUE;
      class CELLINFO;
//      class CELL_ELEMENT;
};

class SDF::CELL_ELEMENT {
      HASH::PTR *infoHash;  /* stores CELLINFO * based on key with instance pi
n */
};

if you forget to include a member class definition and try to declare
it later, the compiler crashes 

In file included from sdf_parse.y:56:
sdf.priv.h:276: Internal compiler error.
sdf.priv.h:276: Please submit a full bug report to address@hidden'.
make: *** [/vobs/magmadt/debug/obj_sunos5_sun4/sdf/sdf_parse.tab.o] Error 1