We don't want to disable this because it is a valuable warning. It is the one that warns on if (x = 5) for example. This warning only trips in third_party headers so I plan to use the same suppression style as boost added: https://github.com/boostorg/mpl/blob/3c1910797cf2a9e6f18a0a929bec95837accfb9e/include/boost/mpl/assert.hpp#L187-L206