Calls stan::math::log_mix rather than explicit calc for error_handling purproses
Calls stan::math::log_mix rather than explicit calc for error_handling
purproses

stan-dev/stan,stan-dev/stan,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/stan