When HWI experiences a crash (which can happen for example when Ledger Live is also running), pyinstaller fails to delete the temporary directory it creates when expanding hwi into a directly executable form. A couple of Sparrow users have reported that if executed multiple times in this situation, the tmp directory gradually fills up with 50Mb folders that look like _MEIxxxxxx.

As I noted in sparrowwallet/sparrow#629, this is a known (and old) issue in pyinstaller that has only very recently been fixed. I'm opening this issue to track an update to the pyinstaller dependency in HWI.

Fwiw, I still believe that a --onedir build for HWI makes more sense however, particularly wrt MacOS (see #327) but also in general since expanding 50Mb folders on every invocation does not seem very efficient :) I have been using this approach for some years now on MacOS and it has proven to be preferable IMHO, at least for application developers.