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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
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Date: Sat, 15 Apr 2023 09:30:34 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: ice-checking, ice-on-valid-code, needs-bisection
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109521

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|11.3.1, 12.2.1, 13.0        |11.1.0
      Known to work|10.4.1                      |10.4.0
   Target Milestone|---                         |11.4
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |ice-checking,
                   |                            |ice-on-valid-code,
                   |                            |needs-bisection
            Summary|[11/12/13 regression]       |[11/12/13 Regression]
                   |Checking ICE with canonical |Checking ICE with canonical
                   |types differ for identical  |types differ for identical
                   |types =E2=80=98UBYTE [7]=E2=80=99 {aka      |types =E2=
=80=98UBYTE [7]=E2=80=99 {aka
                   |=E2=80=98unsigned char [7]=E2=80=99} and    |=E2=80=98u=
nsigned char [7]=E2=80=99} and
                   |=E2=80=98unsigned char [7]=E2=80=99         |=E2=80=98u=
nsigned char [7]=E2=80=99
   Last reconfirmed|                            |2023-04-15

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced:
```
struct vector
{
  vector&       operator=3D(vector&& __x)
  {
    return *this;
  }
};
struct tree_node {
  vector childs;
  unsigned char pad[7];
  tree_node(){}
};
tree_node mcts_root;
void find_Horner_MCTS_expand_tree () {
    mcts_root =3D  tree_node();
}
```
Compile at -O2 -Wall is enough to reproduce the failure.
Note using unsigned short or unsigned int instead of unsigned char allows i=
t to
work.=