2011/2/3 Maciej Fijalkowski <fijall at gmail.com>: > You should make PyPy print warnings >> when it encounters mixed-type classes :) >> > That's not a bad idea actually. Maybe with something like some -X option? If we use the warnings module to emit JitWarnings, the option could be -Wd::JitWarning -- Amaury Forgeot d'Arc