[Bug debug/46102] New: ICE: SIGSEGV in dwarf2out_finish (dwarf2out.c:8490) with -feliminate-dwarf2-dups when using precompiled headers

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46102

           Summary: ICE: SIGSEGV in dwarf2out_finish (dwarf2out.c:8490)
                    with -feliminate-dwarf2-dups when using precompiled
                    headers
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


----- testcase.H -----
/* NOTHING */
----------------------
----- testcase.C -----
#include "testcase.H"
int i;
----------------------

Generate files:
echo "" > testcase.H
echo '#include "testcase.H"' > testcase.C
echo 'int i;' >> testcase.C

Compile:
(testcase.H can be compiled with -feliminate-dwarf2-dups, it still fails)
$ gcc -g testcase.H
$ gcc -g testcase.C -feliminate-dwarf2-dups
testcase.C:2:6: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Related valgrind output:
==21702== Invalid read of size 8
==21702==    at 0x74AB61: dwarf2out_finish (dwarf2out.c:8490)
==21702==    by 0x9C6A15: toplev_main (toplev.c:961)
==21702==    by 0x658ABBC: (below main) (in /lib64/libc-2.11.2.so)
==21702==  Address 0x20 is not stack'd, malloc'd or (recently) free'd
==21702== 
testcase.C:2:6: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r165719 - crash
r158095 - crash
r153685 - crash
4.1.2, 4.2.4, 4.3.5, 4.4.5 - crash