An ICE that does not generate a full report

[Alice Osako]

    Note: these files are modified from the ones in
      the M2PP GitHub repo.
    
      I've been experimenting with the BasicFileSys section of M2PP (configured for GM2, ISO
      dialect, and the POSIX I/O libraries) and in order to provide the
      POSIX open() function (used in the procedure
    CreateFile()) I added a fcntl.def FFI defining the function interface and
      relevant types; this file in turn imports types from SysTypes.def . 
      
      However, when I compile BasicFileSys.mod , using the make target:
    
      bfsys: $(SRC)/BasicFileSys.mod $(INC)/BasicFileSys.def
      $(INC)/Size.def $(INC)/stdio.def $(INC)/fcntl.def
      $(INC)/SysTypes.def
          $(COMPILER) $(FLAGS) -I$(INC)/ -c $(SRC)/BasicFileSys.mod \
          -o $(OBJ)/BasicFileSys.o
    
      I get the following error message:
      
      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    gm2 -g -fiso -freport-bug
      -Isrc/ -c src/imp/BasicFileSys.mod \
      -o obj/BasicFileSys.o
      terminate called after throwing an instance of 'unsigned int'
      cc1gm2: internal compiler error: Aborted
      0x22aca27 internal_error(char const*, ...)
              ???:0
      0x7f7b9bf3b6c7 gsignal
              ???:0
      0x7f7b9bf234b7 abort
              ???:0
      0x238251b __cxxabiv1::__terminate(void (*)())
              ???:0
      0x2382588 std::terminate()
              ???:0
      0x23826ec __cxa_throw
              ???:0
      0xc2de73 fold(tree_node*)
              ???:0
      0x95f787 m2convert_BuildConvert
              ???:0
      0x96259a m2expr_BuildIndirect
              ???:0
      0x9ac13b M2GenGCC_ConvertQuadsToTree
              ???:0
      0x9dafe6 M2Scope_ForeachScopeBlockDo2
              ???:0
      0x9907b4 M2Code_CodeBlock
              ???:0
      0x990bd3 M2Code_Code
              ???:0
      0x992430 M2Comp_compile
              ???:0
      Please submit a full bug report, with preprocessed source.
      Please include the complete backtrace with any bug report.
      See <https://gcc.gnu.org/bugs/> for instructions.
      The bug is not reproducible, so it is likely a hardware or OS
      problem.
    
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      
      Attached are the relevant modules and the Makefile. Again, just to be clear, these files are
      modified from the ones in the M2PP GitHub repo.

BasicFileSys.def
Description: Text document

SysTypes.def
Description: Text document

Makefile
Description: Text document

BasicFileSys.mod
Description: audio/mod

fcntl.def
Description: Text document