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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/105634] [9/10/11/12/13 Regression] ICE: Floating point
 exception in maybe_warn_class_memaccess
Date: Tue, 17 May 2022 19:05:59 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105634

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot=
 gnu.org

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fix:

--- a/gcc/cp/call.cc
+++ b/gcc/cp/call.cc
@@ -10329,6 +10329,8 @@ maybe_warn_class_memaccess (location_t loc, tree
fndecl,
      /* Finally, warn on partial copies.  */
      unsigned HOST_WIDE_INT typesize
        =3D tree_to_uhwi (TYPE_SIZE_UNIT (desttype));
+     if (typesize =3D=3D 0)
+       break;
      if (unsigned HOST_WIDE_INT partial =3D tree_to_uhwi (sz) % typesize)
        warned =3D warning_at (loc, OPT_Wclass_memaccess,
                 (typesize - partial > 1=