id summary reporter owner description type status milestone component version severity resolution keywords cc 11080 MSVC level 4 compiler warnings in function_output_iterator Erik Levin jeffrey.hellrung "When compiling a project using signals2 (boost v. 1.56) with warning level 4 (/W4) in Visual Studio 2013, warnings are generated on the file function_output_iterator.hpp. The warning is C4512: assignment operator could not be generated. Supplying patch which solves the issue by declaring those classes noncopyable." Bugs new To Be Determined iterator Boost 1.56.0 Problem