objcopy --redefine-sym(s) segfaults on mach-o-i386

[Michael Opitz]

Hello,

objcopy crashes very often when renaming symbols in mach-o-i386 object files.
I've uploaded a coredump http://176.28.14.46/core.24966  and a small
object file with which the crash happened.
The coredump was generated on linux x86_64
The binutils version is:

x86_64-apple-darwin-objcopy --version
GNU objcopy (GNU Binutils) 2.24.51.20140331
Copyright (C) 2014 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.

The binary was compiled on Mountain Lion with gcc -m32 -c test.c -o test.o
where gcc is really a link on clang:
gcc --version
Apple LLVM version 5.1 (clang-503.0.38) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin12.5.0
Thread model: posix

The problem is reproducible with recent binutils compiled on OSX.
I've also attached a valgrind logmessage.

Kind Regards,
Michael
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