problem with libgcc2 while installing

[Marco]

hello, i am installing gcc-2.95.3 as a cross compiler for target
thumb-coff.
first i succeeded in installing the original version of it. Then i made
changes to files thumb.h and thumb.md and still I was able to install
it.
Then I added some code to file combine.c and also inluded a small header
file into it.
The file combine.c itself got compiled successfully, but I had the
following installation error:

...
_muldi3
../../source/gcc-2.95.3/gcc/libgcc2.c: In function `__muldi3':
../../source/gcc-2.95.3/gcc/libgcc2.c:305: Internal compiler error in
`copy_rtx', at ../../source/gcc-2.95.3/gcc/rtl.c:396
Please submit a full bug report.


I configure with the command:
..../configure --target=thumb-coff --with-gnu-as --with-gnu-ld 
--with-newlib

is my code wrong or is there a bug? 

Is it likely that i will get this error with gcc 3.0 too?

Any help highly appreciated
thanks in advance,
Marco Marcello