1 error: extern location for std does not exist:
3 error: `#[panic_handler]` function required, but not found
5 error: language item required, but not found: `eh_personality`
7 = note: this can occur when a binary crate with `#![no_std]` is compiled for a target where `eh_personality` is defined in the standard library
8 = help: you may be able to compile for a target that doesn't need `eh_personality`, specify a target with `--target` or in `.cargo/config`
10 error: aborting due to 3 previous errors