In CW tests, I get a lot of warnings like this one: ### mwcc Compiler: # In: ..\boost\test\impl\test_tools.ipp # From: ..\libs\numeric\conversion\test\traits_test.cpp # -------------------------------------------------------- # 161: /* toler_descr = */ va_arg( args, char const* ); # Warning: ^ # expression has no side effect # (included from: # C:\br\boost\boost\test\included\test_exec_monitor.hpp:26 # C:\br\boost\libs\numeric\conversion\test\test_helpers.cpp:19 # C:\br\boost\libs\numeric\conversion\test\traits_test.cpp:29) ...because of these lines: /* toler_descr = */ va_arg( args, char const* ); Maybe this expression could be changed to something else? Thanks, Stefan