i guess i mentioned the pex thing above because it was funny to me that the extra logging we added to get fatal errors from pantsd-runner processes worked perfectly but of course we still had zero visibility into the issue because of something else. i don't think writing to stderr is obviously incorrect behavior, and of course, the above error wasn't happening before my changes, so like pex isn't doing anything wrong here i just need to check some filehandles in pants and i'm just whining i think