After nearly any command completes:
thread 'main' panicked at 'assertion failed: list.len() > 0', src\tools\cargo\src/cargo\util\job.rs:166:12
stack backtrace:
It still builds or runs whatever I ask, but it always emits that error when its done.
For those who don't know, sandboxie is a sandboxing thing for Windows, which is really important when building random untrusted projects off the internet which could execute arbitrary build scripts and pwn your computer.