> thread management Note that the "runtime parts" in question here refers to initializing OS-level threads, the same as in C. It's not referring to any sort of

> thread management Note that the "runtime parts" in question here refers to initializing OS-level threads, the same as in C. It's not referring to any sort of userspace green thread runtime (which you would need to bring in yourself). no_std disables the parts of the standard lib that rely on having an OS (e.g. threads) or having an allocator. (You can get the allocator parts back in a no_std program if you define your own allocator.) "Panics" aren't something you'd disable, a panic is just a mechanism for crashing the program in a controlled manner. Rust lets you decide whether or not you want panics to abort the program immediately or whether to unwind the program and run destructors, and you can configure this in any Rust codebase via a config key/compiler flag. (If you're using no_std then you can technically also define panics as being an infinite loop, rather than crashing.)