[Bug c++/97895] [11 Regression] ICE in do_auto_deduction, at cp/pt.c:29255

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97895

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Marek Polacek <mpola...@gcc.gnu.org>:

https://gcc.gnu.org/g:25056bdf94d5f3e66bef039702f7fae799ef16b9

commit r11-5178-g25056bdf94d5f3e66bef039702f7fae799ef16b9
Author: Marek Polacek <pola...@redhat.com>
Date:   Wed Nov 18 22:49:59 2020 -0500

    c++: Fix crash with broken deduction from {} [PR97895]

    Unfortunately, the otherwise beautiful

      for (constructor_elt &elt : *CONSTRUCTOR_ELTS (init))

    is not immune to an empty constructor, so we have to check
    CONSTRUCTOR_ELTS first.

    gcc/cp/ChangeLog:

            PR c++/97895
            * pt.c (do_auto_deduction): Don't crash when the constructor has
            zero elements.

    gcc/testsuite/ChangeLog:

            PR c++/97895
            * g++.dg/cpp0x/auto54.C: New test.