intrenal compiler error

[dima]

$uname -a: Linux 2.4.3 i686
working via ssh from the FreeBSD workstation

$g++ --version
egcs-2.91.66
unfortunately i don't know how was the package built, but i guess the 
default binary distribution was installed

g++ -I/usr/local/include -I../../wtk/include -I../lib/obj -L../lib/obj 
-L../../wtk/lib -L/usr/local/lib -I/usr/include/pgsql 
-I/usr/include/pgsql/libpq++ -I/usr/include/mysql -s -pipe -c -Wall 
priveleges.cpp

vector<vector<string> > l = ( SomeClass * )packet->list;

SomeClass *tmp = (SomeClass * )packet;
vector<vector<string> > l = tmp->list;
works OK

i used the 1st scheme in many other project files, but this leads to 
internal compiler error in 1 particular file created today.