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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/94730] [8/9/10 Regression] internal compiler error: in
 fold_convert_loc, at fold-const.c:2435
Date: Thu, 23 Apr 2020 18:05:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94730

--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery =
dot com> ---
I'd suspect the code in finish_decl that deals with types determined from=20
array initializers ("For global variables, update the copy of the type=20
that exists in the binding.") of being involved here.

                  if (b_ext->u.type && comptypes (b_ext->u.type, type))
                    b_ext->u.type =3D composite_type (b_ext->u.type, type);
                  else
                    b_ext->u.type =3D type;

If the new type isn't compatible with the existing type of the=20
declaration, it should probably not be stored in b_ext->u.type.=