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From: "aldyh at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/109593] valgrind error doing build of latest gcc trunk
Date: Sat, 22 Apr 2023 19:04:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109593

--- Comment #5 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Huh.  I'm gonna guess:

commit 10e481b154c5fc63e6ce4b449ce86cecb87a6015
Author: Aldy Hernandez <aldyh@redhat.com>
Date:   Thu Jan 26 04:46:54 2023 +0100

    Return true from operator=3D=3D for two identical ranges containing NAN.


-      if (known_isnan () || src.known_isnan ())
-       return false;
-
       return (real_identical (&m_min, &src.m_min)
              && real_identical (&m_max, &src.m_max)
              && m_pos_nan =3D=3D src.m_pos_nan

If either operand is a NAN, m_min or m_max have garbage.  Can you verify th=
at's
the commit?  Either way, I can take a look at it on Monday.=