lockfree on armv7, bus error (core dumped)

``` c++
# root at alarmpi in ~ [21:36:15]
$ cat test.cpp
#include
#include
#include

std::atomic_int intcount;
boost::lockfree::queue intpool(100);

int main()
{
return 0;
}

# root at alarmpi in ~ [21:36:53]
$ g++ test.cpp -std=c++11

# root at alarmpi in ~ [21:37:15]
$ ./a.out
[1] 31406 bus error (core dumped) ./a.out

# root at alarmpi in ~ [21:37:27]
$ coredumpctl gdb 31406
PID: 31406 (a.out)
UID: 0 (root)
GID: 0 (root)
Signal: 7 (BUS)
Timestamp: 一 2015-04-27 21:37:27 CST (12s ago)
Command Line: ./a.out
Executable: /root/a.out
Control Group: /user.slice/user-0.slice/session-c6.scope
Unit: session-c6.scope
Slice: user-0.slice
Session: c6
Owner UID: 0 (root)
Boot ID: f2ff2834fe86475d8008560472158aa9
Machine ID: 20d4f52b53de4dd9aa7ac72e93285b0a
Hostname: alarmpi
Coredump: /var/lib/systemd/coredump/core.a\x2eout.0.f2ff2834fe86475d8008560472158aa9.31406.1430141847000000.lz4
Message: Process 31406 (a.out) of user 0 dumped core.

GNU gdb (GDB) 7.9
Copyright (C) 2015 Free Software Foundation, Inc.
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This GDB was configured as "armv7l-unknown-linux-gnueabihf".
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Reading symbols from /root/a.out...(no debugging symbols found)...done.
[New LWP 31406]
Core was generated by `./a.out'.
Program terminated with signal SIGBUS, Bus error.
#0 0x00010ec8 in std::atomic::node, std::allocator::node> >::freelist_node> >::load(std::memory_order) const ()
(gdb) bt
#0 0x00010ec8 in std::atomic::node, std::allocator::node> >::freelist_node> >::load(std::memory_order) const ()
#1 0x0001110c in boost::lockfree::detail::freelist_stack::node, std::allocator::node> >::deallocate_impl_unsafe(boost::lockfree::queue::node*) ()
#2 0x00010e94 in void boost::lockfree::detail::freelist_stack::node, std::allocator::node> >::deallocate(boost::lockfree::queue::node*) ()
#3 0x00010bd0 in boost::lockfree::detail::freelist_stack::node, std::allocator::node> >::freelist_stack::node> >(std::allocator::node> const&, unsigned int) ()
#4 0x00010a34 in boost::lockfree::queue::queue(unsigned int) ()
#5 0x000107e8 in __static_initialization_and_destruction_0(int, int) ()
#6 0x00010820 in _GLOBAL__sub_I_intcount ()
#7 0x000119f4 in __libc_csu_init ()
#8 0x76c22ccc in __libc_start_main () from /usr/lib/libc.so.6
#9 0x0001065c in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) q

# root at alarmpi in ~ [21:37:47]
$ uname -a
Linux alarmpi 3.18.11-4-ARCH #1 SMP PREEMPT Tue Apr 21 21:52:58 MDT 2015 armv7l GNU/Linux

# root at alarmpi in ~ [21:37:50]
$ g++ -v
使用内建 specs。
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/armv7l-unknown-linux-gnueabihf/4.9.2/lto-wrapper
目标：armv7l-unknown-linux-gnueabihf
配置为：/build/gcc/src/gcc-4.9-20150304/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://github.com/archlinuxarm/PKGBUILDs/issues --enable-languages=c,c++,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-cloog-backend=isl --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --disable-multilib --disable-werror --enable-checking=release --host=armv7l-unknown-linux-gnueabihf --build=armv7l-unknown-linux-gnueabihf --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16
线程模型：posix
gcc 版本 4.9.2 20150304 (prerelease) (GCC)

# root at alarmpi in ~ [21:37:58]
$ /lib/libc-2.21.so
GNU C Library (GNU libc) stable release version 2.21, by Roland McGrath et al.
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Compiled by GNU CC version 4.9.2 20150304 (prerelease).
Available extensions:
crypt add-on version 2.1 by Michael Glad and others
GNU Libidn by Simon Josefsson
Native POSIX Threads Library by Ulrich Drepper et al
BIND-8.2.3-T5B
libc ABIs: UNIQUE
For bug reporting instructions, please see:
.
```