Code coverage dropped to ~20% after bpart changes #57668
Description
Based on https://coveralls.io/builds/71969345 and https://app.codecov.io/gh/JuliaLang/julia/commit/f209eba244d55afbf7aeff298434deba4fcbe30a, f209eba (merge commit of #57150) code coverage of Base dropped from >90% to ~20%.