[Bug ld/25993] Bug in bfd causes crashes with DXVK

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25993

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2020-05-17
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED

--- Comment #7 from Alan Modra <amodra at gmail dot com> ---
We should do something about the above local_sym_name pointer into what is
freed memory after pe.em/pep.em have twiddled the bfd filename.  The simplest
solution is to make another copy of the name in add_archive_element, which I
think would mean the pe.em/pep.em changes are not needed.

An alternative approach is to make bfd_set_filename allocate a copy of the name
using bfd_alloc and not free any old name.  I think that's the best solution,
and I have a patch to do that but it touches a lot of files and probably should
be held off until after the gdb-9.2 release next weekend.

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