That's an interesting point; I think it might depend on the exact details of how stuff is getting put into that tempfile. It's possible that anything getting read in via "silent mode" (see `-s` in https://ss64.com/bash/read.html) might not get put into that file, but given that this was a bug rather than a feature, it would probably be better to check the source code (or try an example with an unpatched version) to be sure.