gfortran 9.3 failed to compile

[MarineLasbleis]

I got an error while compiling CN-stream on Ubuntu 20.04, with compiler Gfortran 9.3.0: I got an internal compiler error.
Compiling with an intel compiler worked.

Here is the error:

cmake --build build
Scanning dependencies of target fymc
[  2%] Building Fortran object src/libFyMc/CMakeFiles/fymc.dir/src/mfpGlobal.f90.o
[  5%] Building Fortran object src/libFyMc/CMakeFiles/fymc.dir/src/general/mfpGeneral.f90.o
string/string.inc:165:0:

Warning: '__builtin_memset' specified bound 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
[  8%] Building Fortran object src/libFyMc/CMakeFiles/fymc.dir/src/geometry/mfpGeometry.f90.o
f951: internal compiler error: in generate_finalization_wrapper, at fortran/class.c:2027
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-9/README.Bugs> for instructions.
make[2]: *** [src/libFyMc/CMakeFiles/fymc.dir/build.make:101: src/libFyMc/CMakeFiles/fymc.dir/src/geometry/mfpGeometry.f90.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:118: src/libFyMc/CMakeFiles/fymc.dir/all] Error 2
make: *** [Makefile:136: all] Error 2