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Subject: [Bug sanitizer/99106] [9 Regression] ICE in tree_to_poly_int64, at
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Date: Thu, 22 Apr 2021 16:50:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99106

--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-8 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:3a51e6261f7d98d54fc370125b1895542c3cdce9

commit r8-10886-g3a51e6261f7d98d54fc370125b1895542c3cdce9
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Feb 17 15:03:25 2021 +0100

    c++: Fix up build_zero_init_1 once more [PR99106]

    My earlier build_zero_init_1 patch for flexible array members created
    an empty CONSTRUCTOR.  As the following testcase shows, that doesn't wo=
rk
    very well because the middle-end doesn't expect CONSTRUCTOR elements wi=
th
    incomplete type (that the empty CONSTRUCTOR at the end of outer CONSTRU=
CTOR
    had).

    The following patch just doesn't add any CONSTRUCTOR for the flexible a=
rray
    members, it doesn't seem to be needed.

    2021-02-17  Jakub Jelinek  <jakub@redhat.com>

            PR sanitizer/99106
            * init.c (build_zero_init_1): For flexible array members just
return
            NULL_TREE instead of returning empty CONSTRUCTOR with non-compl=
ete
            ARRAY_TYPE.

            * g++.dg/ubsan/pr99106.C: New test.

    (cherry picked from commit af868e89ec21340d1cafd26eaed356ce4b0104c3)=