Segfaults relating to libpthread

I'm seeing this with 2.11.1-0ubuntu2:

$ gdb -- git clone git://github.com/reductivelabs/puppet-dashboard.git
Excess command line arguments ignored. (git://github.com/reductivelabs/puppet-dashboard.git)
GNU gdb (GDB) 7.0.1-ubuntu
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Reading symbols from /usr/bin/git...(no debugging symbols found)...done.
/tmp/clone: No such file or directory.
(gdb) run
Starting program: /usr/bin/git
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x00007fffffffeae8 in ?? ()
(gdb) bt
#0 0x00007fffffffeae8 in ?? ()
#1 0x00007ffff79b978c in __pthread_initialize_minimal_internal () at nptl-init.c:422
#2 0x00007ffff79b8f79 in _init () from /lib64/libpthread.so.0
#3 0x0000000000000000 in ?? ()
(gdb)