Illegal instructions on termination

[brycelelbach]

[reported by blelbach] [Trac time Fri Jan 27 02:18:06 2012] GCC 4.6.2, release mode, Boost 1.47, r6856

I believe 2235171 may be related.

[02:15:35]:wash@vega:/home/wash/development/parallex/trunk/hpx/gcc-4.6.2-release$ bin/pxthread 
invoked 500000 px-threads in 4.93651 seconds
Received Illegal instruction, 4 frames:
0x7f03b4985c44  : hpx::detail::backtrace() + 0x64 in /tmp/wash-gcc-4.6.2-release/lib/hpx/libhpx.so.0
0x7f03b49b16b6  : hpx::termination_handler(int) + 0x16 in /tmp/wash-gcc-4.6.2-release/lib/hpx/libhpx.so.0
0x7f03b2185020  : ??? + 0xb2185020 in /lib/x86_64-linux-gnu/libpthread.so.0
0x7f03aad6f000  : ???
Aborted

[02:15:25]:wash@vega:/home/wash/development/parallex/trunk/hpx/gcc-4.6.2-release$ bin/eager_future 
invoked 500000 futures in 6.94925 seconds
Received Illegal instruction, 4 frames:
0x7fa1e46bfc44  : hpx::detail::backtrace() + 0x64 in /tmp/wash-gcc-4.6.2-release/lib/hpx/libhpx.so.0
0x7fa1e46eb6b6  : hpx::termination_handler(int) + 0x16 in /tmp/wash-gcc-4.6.2-release/lib/hpx/libhpx.so.0
0x7fa1e1ebf020  : ??? + 0xe1ebf020 in /lib/x86_64-linux-gnu/libpthread.so.0
0x7fa1daaa8c21  : ???
Aborted