[asio] regression test failures on VC10 beta 1

[Richard Webb <richard.webb@…>]

The 'buffer' and 'buffer_select' tests are failing on VC10 beta 1 (e.g. ​http://tinyurl.com/rdgjaf), due to a crash that occurs on line 439 of asio/buffer.hpp.

The crash actually seems to be a VC10 bug (see ​https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=458027), but while testing i found that changing the workaround on line 435 to

#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400) && BOOST_WORKAROUND(BOOST_MSVC, < 1600)

(i.e. not applying the workaround to VC10) fixes the problem and doesn't introduce any other failures, so it might be ok to just not use the workaround in VC10.

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For reference, the read_until test is also failing, but that seems to be purely down to the VC10 bug described @

​https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=456631

which causes the basic_streambuf constructor at line 126 of basic_streambuf.hpp to attempt to allocate std::numeric_limits<std::size_t>::max bytes of memory.

[Richard Webb <richard.webb@…>]

f.y.i, MS have updated the first issue described above saying that it is by design, so it seems that a Boost change is in order.

[Richard Webb <richard.webb@…>]

Seems that this failure has been fixed by change [57393].