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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/89494] Bootstrap error when using GCC 4.2.1
Date: Tue, 14 Apr 2020 21:13:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D89494

--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Since Richard's change, assign_parm_data_one has the arg member with
function_arg_info type, and that class has a user-provided default construc=
tor.
Perhaps for old GCC we could instead of
  *data =3D assign_parm_data_one ();
do
  static assign_parm_data_one zeroed_arg;
  *data =3D zeroed_arg;
or whatever else actually works.
I'll try tomorrow to cook up a short testcase with the function_arg_info
default ctor and assign_parm_data_one containing it and see what GCC 4.2 do=
es
with it.=