I've found an odd issue that appears to stem from Parallels inappropriately using bash. There are a large number of occurrences of zero-byte sh-thd-* files in /private/var/tmp. After "upgrading" to macOS 10.15.2, it appears as though something is generating these files (such as `sh-thd-8993079368706695386`) within my `/private/var/tmp` folder. From doing a little searching, it appears that these are coming from `bash` and that Parallels is the process that's spawning these instances. For example, `sudo fs_usage | grep thd` shows that `bash is indeed spawning these, but I'm using `ZSH` for my general shell usage, so something else had to be spawning `bash` which is then subsequently spawning these. I found that only two things were spawning `bash`: 1) Parallels & 2) `com.amazon.sendtokindle.launcher`. After disabling `com.amazon.sendtokindle.launcher` this mess kept on occurring. This, therefore, leads me to see and understand that Parallels is not only spawning bash very rapidly and continually, but it is leaving a lot of trash files behind that were not there in macOS 10.14.6 (Mojave).
