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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Date: Mon, 16 Mar 2020 08:47:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94188

            Bug ID: 94188
           Summary: [10 Regression] error: request for member =E2=80=98node=
=E2=80=99 in
                    something not a structure or union since
                    r10-7127-gcb99630f254aaec6
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

Reduced from lvm2:

$ cat libdm.i
struct dm_tree_link {
  int list;
  int node;
} fn1() {
  0 ? ((struct dm_tree_link *)((char *)fn1 -
                               (char *)&((struct dm_tree_link *)0)->list))
          ->node
    : 0;
}

$ gcc-9 libdm.i -c
$ gcc libdm.i -c
libdm.i: In function =E2=80=98fn1=E2=80=99:
libdm.i:7:11: error: request for member =E2=80=98node=E2=80=99 in something=
 not a structure or
union
    7 |           ->node
      |           ^~=