Numerical errors in rolling std (0.23.4)
@DieterDePaepe I saw your https://github.com/numpy/numpy/issues/7753#issuecomment-451501724, can you provide more information and perhaps a reproducer? What pandas version? Your comment is from Jan 2019 and #18481 was merged in Late Nov 2018, does the issue still exist for you?

xref #9420 , #18430, #27202, #9420