[boost] BOOST_CHECK_THROW gives spirious warning

Hello, when running "bjam test" in libs/program_options/test, I get this: ../../../libs/program_options/test/cmdline_test.cpp:472: warning: statement with no effect Line 472 contains: BOOST_CHECK_THROW(cmdline cmd(1, (const char*const *)argv, allow_long), invalid_command_line_style); and I did not touch that line for a long time. I think the warning is caused by some Boost.Test change. Any change to fix this? Thanks, Volodya