| error: extern location for std does not exist: | |
| error: `#[panic_handler]` function required, but not found | |
| error: unwinding panics are not supported without std | |
| | | |
| = help: using nightly cargo, use -Zbuild-std with panic="abort" to avoid unwinding | |
| = note: since the core library is usually precompiled with panic="unwind", rebuilding your crate with panic="abort" may not be enough to fix the problem | |
| error: aborting due to 3 previous errors | |