Hi,
I tried to debug fortran.dg/pr95090.f90, which showed
f951: internal compiler error: Segmentation fault
0x83cfe3c ???
../sysdeps/i386/start.S:117
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Using GDB (8.3.1), I got
#> f951="`$instdir/bin/gcc -print-prog-name=f951`"
#> gdb -ex run -ex bt --batch --args $f951 fortran.dg/pr95090.f90
Program received signal SIGSEGV, Segmentation fault.
0xf7aa5162 in __strlen_sse2_bsf () from /lib/libc.so.6
#0 0xf7aa5162 in __strlen_sse2_bsf () from /lib/libc.so.6
#1 0x083e7c3f in get_unique_hashed_string(char*, gfc_symbol*) ()
#2 0x083e85a4 in gfc_find_derived_vtab(gfc_symbol*) ()
#3 0x0847fde1 in resolve_fl_derived(gfc_symbol*) ()
#4 0x0847c717 in resolve_symbol(gfc_symbol*) ()
#5 0x084a78d0 in do_traverse_symtree(gfc_symtree*, void (*)(gfc_symtree*), void (*)(gfc_symbol*)) ()
#6 0x08487f77 in resolve_types(gfc_namespace*) ()
#7 0x0847b6e5 in gfc_resolve(gfc_namespace*) ()
#8 0x0846e9f6 in gfc_parse_file() ()
#9 0x084bebe7 in gfc_be_parse_file() ()
#10 0x08a3b59e in compile_file() ()
#11 0x083c98a5 in toplev::main(int, char**) ()
#12 0x083cd9b1 in main ()
So far so good, but there are no file locations shown, and I can't
switch frames and list code in GDB.
This although I built GCC with debug information and binaries are not stripped.
I built GCC with
#> ../configure --enable-checking=yes,extra i686-linux
#> make BOOT_CFLAGS="-O2 -ggdb" bootstrap2-lean
In desperation, I even tried
#> make BOOT_CFLAGS="-O2 -fanalyzer" bootstrap2-lean
and
#> make BOOT_CFLAGS="-O2 -fsanitize=address" bootstrap2-lean
but both compilation attempts failed.
Are there any magic knobs to make GDB output more useful?
Thanks,
Manfred
