https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97207

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |nvptx
                 CC|                            |rguenth at gcc dot gnu.org

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Regression, started at:
...
commit 4b9d61f79c0c0185a33048ae6cc72269cf7efa31
Author: Richard Biener <rguent...@suse.de>
Date:   Thu Aug 6 14:50:56 2020 +0200

    add move CTOR to auto_vec, use auto_vec for get_loop_exit_edges

    This adds a move CTOR to auto_vec<T, 0> and makes use of a
    auto_vec<edge> return value for get_loop_exit_edges denoting
    that lifetime management of the vector is handed to the caller.

    The move CTOR prompted the hash_table change because it appearantly
    makes the copy CTOR implicitely deleted (good) and hash-table
    expansion of the odr_enum_map which is
    hash_map <nofree_string_hash, odr_enum> where odr_enum has an
    auto_vec<odr_enum_val, 0> member triggers this.  Not sure if
    there's a latent bug there before this (I think we're not
    invoking DTORs, but we're invoking copy-CTORs).
...

The type bracket_vec_t is defined as:
...
typedef auto_vec<bracket> bracket_vec_t;
...
so that does look at least related.

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