id summary reporter owner description type status milestone component version severity resolution keywords cc 5261 property_tree/details/json_parser_read.hpp generates ambiguous symbol error on MSVC aubrey@… Sebastian Redl "On line 181 of the referenced file (json_parser_read.hpp), the author writes: ""using namespace boost::spirit::classic;"". This then generates ambiguous symbol references with ""boost::assertion"" during the following 'assertion' declarations. Adding an explicit namespace resolution to each 'assertion' declaration resolves the defect." Bugs closed To Be Determined property_tree Boost 1.46.0 Problem fixed