> I reported a bug in io.popen() a week ago. It is not listed and > apparently not fixed in RC1. Are there plans to fix it? Thanks for the reminder. Do you know what are the valid modes for MSVS? The documentation in [1] does not seem to be correct. (I would deduce that mode must match "[rw][bt]?", but the page says it matches "[rwbt]".) [1] https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/popen-wpopen?view=vs-2019 -- Roberto