Dear all, The reason I tried to switch to a newer compiler is that the older compiler crashed on, I suspect, memory usage. Increasing a const that determines the size of a number of arrays causes the crash. Restoring the const to the old value gives a fine compilation. Compiler gpc 20030830, based on gcc-3.2.1 also crashes on a linux machine. The crashes are consistent in the following way: At a clean start, i.e. after removing all the object and gpi files, the compiler crashes after line 86 in writestruct.p (see below). Subsequent compile runs, with the already compiled .o and .gpi files available, consistently show line 120 of the same file. Could be a --progress-messages thing, not related to the real cause of the crash, but I am not sure. I do not know how to single out the problem for this case. Aside of posting the backtrace, I am in the dark. Can anyone point me to information on how to attack this problem? Thanks for your consideration, Regards, Marten Jan % uname -a Linux so3 2.4.18-14smp #1 SMP Wed Sep 4 12:34:47 EDT 2002 i686 i686 i386 GNU/Linux % make_fem <snip> #progress# IO/writestruct.p (86) gpc: Internal error: Segmentation fault (program gpc1) Please submit a full bug report. See <URL:http://www.gnu-pascal.de/todo.html> for instructions. gpc1: gpc exited with status 1 % gdb \ /cluster3/deruiter/system/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/gpc1 \ core.22274 GNU gdb Red Hat Linux (5.2.1-4) Copyright 2002 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-redhat-linux"... Core was generated by `/cluster3/deruiter/system/lib/gcc-lib/i686-pc-linux-gnu/3.2.1/gpc1 /tmp/ccgaf2M'. Program terminated with signal 11, Segmentation fault. Reading symbols from /lib/i686/libc.so.6...done. Loaded symbols for /lib/i686/libc.so.6 Reading symbols from /lib/ld-linux.so.2...done. Loaded symbols for /lib/ld-linux.so.2 #0 emit_library_call_value_1 (retval=0, orgfun=0x40014b60, value=0x0, fn_type=1076180224, outmode=VOIDmode, nargs=3, p=0xbfbddaf8 "�@~�\b�\b0۽ zC@\030\t>@\030B\001@") at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/calls.c:3811 3811 memcpy (stack_usage_map, initial_stack_usage_map, (gdb) backtrace #0 emit_library_call_value_1 (retval=0, orgfun=0x40014b60, value=0x0, fn_type=1076180224, outmode=VOIDmode, nargs=3, p=0xbfbddaf8 "�@~�\b�\b0۽ zC@\030\t>@\030B\001@") at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/calls.c:3811 #1 0x081020ed in emit_library_call (orgfun=0xbf7bd370, fn_type=3212563312, outmode=3212563312, nargs=-1082403984) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/calls.c:4228 #2 0x080ac770 in emit_push_insn (x=0x403ecb40, mode=BLKmode, type=0x40294b60, size=0x403e0918, align=1, partial=0, reg=0x0, extra=0, args_addr=0x4024e070, args_so_far=0x527, reg_parm_stack_space=0, alignment_pad=0x40014210) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/expr.c:3467 #3 0x08102702 in store_one_arg (arg=0xbfffe2f8, argblock=0x4024e070, flags=0, variable_size=0, reg_parm_stack_space=0) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/calls.c:4587 #4 0x080ffb23 in expand_call (exp=0x40437640, target=0x0, ignore=1) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/calls.c:2968 #5 0x080b35f3 in expand_expr (exp=0x40437a20, target=0x0, tmode=VOIDmode, modifier=EXPAND_NORMAL) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/expr.c:7379 #6 0x0825c05a in expand_expr_stmt_value (exp=0xbfffe2f8, want_value=1, maybe_last=1076180224) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/stmt.c:2247 #7 0x0825bf91 in expand_expr_stmt (exp=0xbf7bd370) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/stmt.c:2201 #8 0x08051e1b in yyuserAction (yyn=562, yyrhslen=3, yyvsp=0x840e650, yyvalp=0xbfffe88c, yylocp=0xbfffe890, yystack=0xbfffe8f0) at parse.c:4580 #9 0x08058367 in yydoAction (yystack=0xbfffe8f0, yyk=0, yyrule=562, yyvalp=0xbfffe88c, yylocp=0xbfffe890) at parse.c:8218 #10 0x08057ee9 in yyglrReduce (yystack=0xbfffe8f0, yyk=0, yyrule=562, yyforceEval=1 '\001') at parse.c:8290 #11 0x08057436 in main_yyparse () at parse.c:8991 #12 0x080e3954 in compile_file () at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/toplev.c:2124 #13 0x080e85e9 in do_compile () at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/toplev.c:5218 #14 0x080e8659 in toplev_main (argc=-1082403984, argv=0x0) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/toplev.c:5250 #15 0x080f168b in main (argc=-1082403984, argv=0xbf7bd370) at /cluster3/deruiter/system/src/gcc-3.2.1/gcc/main.c:35 #16 0x420158d4 in __libc_start_main () from /lib/i686/libc.so.6