Reproduce memory leak in Jest

npm i
npm t

Recreated without babel-polyfill

find . -type d -name '*babel-polyfill*' -print

--harmony / --env=node still doesn't help

node --harmony ./node_modules/.bin/jest --no-polyfill --logHeapUsage --env=node

Suggested setup.js doesn't seem to help:

node --harmony node_modules/.bin/jest --env node --setupFilesAfterEnv ./setup.js --logHeapUsage