https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65982

            Bug ID: 65982
           Summary: [5/6 Regression] ICE: in lto_output_varpool_node, at
                    lto-cgraph.c:623
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org
  Target Milestone: ---

markus@x4 tmp % cat proplist-util.i
static int a __attribute__ ((weakref ("b")));
int c;
void
foo (void)
{
  if (a)
    c = 0;
}

markus@x4 tmp % gcc -shared -fPIC -flto -O2 proplist-util.i
lto1: internal compiler error: in lto_output_varpool_node, at lto-cgraph.c:623
0x8cc55e lto_output_varpool_node
        ../../gcc/gcc/lto-cgraph.c:623
0x8cc55e output_symtab()
        ../../gcc/gcc/lto-cgraph.c:1040
0x8d7f03 lto_output()
        ../../gcc/gcc/lto-streamer-out.c:2368
0x931c41 write_lto
        ../../gcc/gcc/passes.c:2395
0x9353d2 ipa_write_optimization_summaries(lto_symtab_encoder_d*)
        ../../gcc/gcc/passes.c:2599
0x5a94ba do_stream_out
        ../../gcc/gcc/lto/lto.c:2500
0x5aa2c2 stream_out
        ../../gcc/gcc/lto/lto.c:2544
0x5aa2c2 lto_wpa_write_files
        ../../gcc/gcc/lto/lto.c:2681
0x5b3dab do_whole_program_analysis
        ../../gcc/gcc/lto/lto.c:3362
0x5b3dab lto_main()
        ../../gcc/gcc/lto/lto.c:3489
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
lto-wrapper: fatal error: /var/tmp/gcc_test/usr/local/bin/gcc returned 1 exit
status
compilation terminated.
/usr/bin/ld: fatal error: lto-wrapper failed
collect2: error: ld returned 1 exit status

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