[Bug symtab/25950] [debug-names] Handle no "Hash Lookup Table"

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=25950

--- Comment #2 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom Tromey <tromey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=3a862152958a1d17742cef7fc43c4d51dd2dcbab

commit 3a862152958a1d17742cef7fc43c4d51dd2dcbab
Author: Tom Tromey <tom@tromey.com>
Date:   Mon Dec 4 07:58:48 2023 -0700

    Empty hash table fix in .debug_names reader

    The handling of an empty hash table in the .debug_names reader is
    slightly wrong.

    Currently the code assumes there is always an array of hashes.
    However, section 6.1.1.4.5 Hash Lookup Table says:

        The optional hash lookup table immediately follows the list of
        type signatures.

    and then:

        The hash lookup table is actually two separate arrays: an array of
        buckets, followed immediately by an array of hashes.

    My reading of this is that the hash table as a whole is optional, and
    so the hashes will not exist in this case.  (This also makes sense
    because the hashes are not useful without the buckets anyway.)

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=25950

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