[Bug debug/50203] New: ICE: in output_loc_list, at dwarf2out.c:8188 with --param max-vartrack-expr-depth=140

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50203

             Bug #: 50203
           Summary: ICE: in output_loc_list, at dwarf2out.c:8188 with
                    --param max-vartrack-expr-depth=140
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25114
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25114
reduced testcase

Compiler output:
$ /mnt/svn/gcc-trunk/binary-latest/bin/gcc -O3 -gdwarf-2 -fno-tree-sink --param
max-vartrack-expr-depth=140 testcase.c
testcase.c:29:1: internal compiler error: in output_loc_list, at
dwarf2out.c:8188
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

(gdb) bt
#0  fancy_abort (file=0x125e160 "/mnt/svn/gcc-trunk/gcc/dwarf2out.c",
line=8188, function=0x1266840 "output_loc_list")
    at /mnt/svn/gcc-trunk/gcc/diagnostic.c:892
#1  0x00000000006f3e0c in output_loc_list (die=Unhandled dwarf expression
opcode 0xfa
) at /mnt/svn/gcc-trunk/gcc/dwarf2out.c:8188
#2  output_location_lists (die=Unhandled dwarf expression opcode 0xfa
) at /mnt/svn/gcc-trunk/gcc/dwarf2out.c:7514
#3  0x00000000006f3bd1 in output_location_lists (die=Unhandled dwarf expression
opcode 0xfa
) at /mnt/svn/gcc-trunk/gcc/dwarf2out.c:7516
#4  0x00000000006f3bd1 in output_location_lists (die=Unhandled dwarf expression
opcode 0xfa
) at /mnt/svn/gcc-trunk/gcc/dwarf2out.c:7516
#5  0x00000000006f3bd1 in output_location_lists (die=Unhandled dwarf expression
opcode 0xfa
) at /mnt/svn/gcc-trunk/gcc/dwarf2out.c:7516
#6  0x0000000000714457 in dwarf2out_finish (filename=Unhandled dwarf expression
opcode 0xf3
) at /mnt/svn/gcc-trunk/gcc/dwarf2out.c:22620
#7  0x00000000009dc3ce in compile_file (argc=18, argv=0x7fffffffda88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:597
#8  do_compile (argc=18, argv=0x7fffffffda88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1886
#9  toplev_main (argc=18, argv=0x7fffffffda88) at
/mnt/svn/gcc-trunk/gcc/toplev.c:1962
#10 0x00007ffff6192d2d in __libc_start_main () from /lib64/libc.so.6
#11 0x000000000055a609 in _start ()

Tested revisions:
r178096 - crash