[fortran] ICE in fold_convert, at fold-const.c:2028

[Bernhard Fischer <rep dot nop at aon dot at>]

Hi,

Before i try to reduce the module in which i'm seeing this, does the
backtrace sound familiar to someone?

TIA,

$ gfortran-4.1-HEAD -v -ffree-form -ffixed-line-length-none -W -Wall
-Wextra -pedantic  -O0 -march=pentium4 -mtune=pentium4 -I./include -c
core_rel.f90
Using built-in specs.
Target: i686-linux-gnu
Configured with: ../../src/gcc/configure -v
--enable-languages=c,c++,f95,treelang --prefix=/opt/gcc-4.1/
--enable-shared --with-system-zlib --libexecdir=/opt/gcc-4.1//lib
--enable-nls --without-included-gettext --enable-threads=posix
--program-suffix=-4.1-HEAD --enable-__cxa_atexit
--enable-libstdcxx-allocator=mt --enable-clocale=gnu --enable-mpfr
--disable-werror --enable-debug --enable-libstdcxx-debug
--enable-checking=release i686-linux-gnu
Thread model: posix
gcc version 4.1.0 20051020 (experimental)
 /opt/gcc-4.1/bin/../lib/gcc/i686-linux-gnu/4.1.0/f951 core_rel.f90
-quiet -dumpbase core_rel.f90 -march=pentium4 -mtune=pentium4 -auxbase
core_rel -O0 -W -Wall -Wextra -pedantic -version -ffree-form
-ffixed-line-length-none -I./include -o /tmp/cc5Ipqva.s
GNU F95 version 4.1.0 20051020 (experimental) (i686-linux-gnu)
	compiled by GNU C version 4.0.2 20050808 (prerelease) (Ubuntu
4.0.1-4ubuntu9).
GGC heuristics: --param ggc-min-expand=99 --param
ggc-min-heapsize=129565
core_rel.f90: In function 'spawn_pp':
core_rel.f90:251: warning: unused variable 'inplin'
core_rel.f90:251: warning: unused variable 'ldum'
core_rel.f90:179: internal compiler error: in fold_convert, at
fold-const.c:2028
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
b@s39:/scratch/src$ gdb -q
/opt/gcc-4.1/bin/../lib/gcc/i686-linux-gnu/4.1.0/f951
Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
(gdb) b fold-const.c:2027
Breakpoint 1 at 0x817611c: file ../../../src/gcc/gcc/fold-const.c, line
2027.
(gdb) run core_rel.f90 -quiet -dumpbase core_rel.f90 -march=pentium4
-mtune=pentium4 -auxbase core_rel -O0 -W -Wall -Wextra -pedantic
-version -ffree-form -ffixed-line-length-none -I./include -o
/tmp/cc4tkN0e.s
Starting program: /opt/gcc-4.1/lib/gcc/i686-linux-gnu/4.1.0/f951
core_rel.f90 -quiet -dumpbase core_rel.f90 -march=pentium4
-mtune=pentium4 -auxbase core_rel -O0 -W -Wall -Wextra -pedantic
-version -ffree-form -ffixed-line-length-none -I./include -o
/tmp/cc4tkN0e.s
GNU F95 version 4.1.0 20051020 (experimental) (i686-linux-gnu)
	compiled by GNU C version 4.0.2 20050808 (prerelease) (Ubuntu
4.0.1-4ubuntu9).
GGC heuristics: --param ggc-min-expand=99 --param
ggc-min-heapsize=129565
core_rel.f90: In function 'spawn_pp':
core_rel.f90:251: warning: unused variable 'inplin'
core_rel.f90:251: warning: unused variable 'ldum'

Breakpoint 1, fold_convert (type=0xb7d9fb24, arg=0xb7dcc8f0) at
../../../src/gcc/gcc/fold-const.c:2028
2028	      gcc_unreachable ();
(gdb) bt
#0  fold_convert (type=0xb7d9fb24, arg=0xb7dcc8f0) at
../../../src/gcc/gcc/fold-const.c:2028
#1  0x080a2963 in gfc_trans_scalar_assign (lse=0xbfbbbd94,
rse=0xbfbbbd6c, type=BT_DERIVED)
    at ../../../src/gcc/gcc/fortran/trans-expr.c:2574
#2  0x080a5f82 in gfc_trans_assignment (expr1=0x85a8a40,
expr2=0x85d40b8)
    at ../../../src/gcc/gcc/fortran/trans-expr.c:2740
#3  0x080a6219 in gfc_trans_assign (code=0xb7db82e0) at
../../../src/gcc/gcc/fortran/trans-expr.c:2792
#4  0x0809508a in gfc_trans_code (code=0x85da758) at
../../../src/gcc/gcc/fortran/trans.c:493
#5  0x080af42e in gfc_trans_do (code=0x861d690) at
../../../src/gcc/gcc/fortran/trans-stmt.c:582
#6  0x08094f3a in gfc_trans_code (code=0x861d690) at
../../../src/gcc/gcc/fortran/trans.c:549
#7  0x080aed4a in gfc_trans_if_1 (code=0x85edf80) at
../../../src/gcc/gcc/fortran/trans-stmt.c:424
#8  0x08094f1d in gfc_trans_code (code=0x85ee6e8) at
../../../src/gcc/gcc/fortran/trans.c:541
#9  0x080a147a in gfc_generate_function_code (ns=0x85a64e0) at
../../../src/gcc/gcc/fortran/trans-decl.c:2494
#10 0x08095265 in gfc_generate_module_code (ns=0x85a5478) at
../../../src/gcc/gcc/fortran/trans.c:712
#11 0x0807b9a7 in gfc_parse_file () at
../../../src/gcc/gcc/fortran/parse.c:2641
#12 0x080916ed in gfc_be_parse_file (set_yydebug=0) at
../../../src/gcc/gcc/fortran/f95-lang.c:286
#13 0x082d32c8 in toplev_main (argc=11, argv=0xbfbbc154) at
../../../src/gcc/gcc/toplev.c:990
#14 0xb7e51ea2 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#15 0x0804ad51 in _start () at ../sysdeps/i386/elf/start.S:119
(gdb) p type->common.code
$1 = RECORD_TYPE
(gdb) c
Continuing.
core_rel.f90:179: internal compiler error: in fold_convert, at
fold-const.c:2028
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.