[Bug debug/86459] New: [9 Regression] ICE in output_macinfo_op, at dwarf2out.c:28095 since r260297

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86459

            Bug ID: 86459
           Summary: [9 Regression] ICE in output_macinfo_op, at
                    dwarf2out.c:28095 since r260297
           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: mark at gcc dot gnu.org
  Target Milestone: ---

Starting from the revision, we ICE on:

$ gcc /home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr86064.c -gsplit-dwarf
-g3 -c
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/pr86064.c:27:1: internal
compiler error: in output_macinfo_op, at dwarf2out.c:28069
 }
 ^
0x92fc8e output_macinfo_op
        /home/marxin/Programming/gcc/gcc/dwarf2out.c:28067
0x92fc75 output_macinfo_op
        /home/marxin/Programming/gcc/gcc/dwarf2out.c:28054
0x930a21 output_macinfo
        /home/marxin/Programming/gcc/gcc/dwarf2out.c:28392
0x955e96 dwarf2out_finish
        /home/marxin/Programming/gcc/gcc/dwarf2out.c:31486