[Bug debug/86456] New: [8/9 Regression] Segfault in switch_to_section at gcc/varasm.c:7353 since r259317

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86456

            Bug ID: 86456
           Summary: [8/9 Regression] Segfault in switch_to_section at
                    gcc/varasm.c:7353 since r259317
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---

Following causes ICE:

$ cat ice2.ii
int a;

$ g++ -flto -g   -gdwarf-5  -ffat-lto-objects ice2.ii -c
ice2.ii:1:6: internal compiler error: Segmentation fault
 int a;
      ^
0xead4ff crash_signal
        /home/marxin/Programming/gcc/gcc/toplev.c:324
0x7ffff69d810f ???
       
/usr/src/debug/glibc-2.27-6.1.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0
0x117b5aa switch_to_section(section*)
        /home/marxin/Programming/gcc/gcc/varasm.c:7353
0xb68ddf dwarf2out_finish
        /home/marxin/Programming/gcc/gcc/dwarf2out.c:31514