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Subject: [Bug libstdc++/96042] Reference type of std::ranges::iota is
 __int128 with -std=c++2a?!
Date: Fri, 13 Nov 2020 13:11:12 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96042

--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:

https://gcc.gnu.org/g:12042aeb9336f20b9225b2e5139e5f6c9bde7642

commit r10-9021-g12042aeb9336f20b9225b2e5139e5f6c9bde7642
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Fri Nov 13 13:04:10 2020 +0000

    libstdc++: Fix test that fails for targets without __int128 [PR 96042]

    When backporting this test (and the changes it depends on) I forgot that
    the __max_diff_type and __max_size_type classes are only present on
    trunk, not the gcc-10 branch. That using iota_view<long long, long long>
    oonly works correctly when __int128 is available, so the test fails on
    32-bit targets.

    This just skips the failing check.

            PR libstdc++/96042
            * testsuite/std/ranges/iota/96042.cc: Only assert that the
            difference type is wider than long long if __int128 is
            supported.=