Nu's Error Messages: Inspiration from Rust

10th chunk of `blog/2019-08-23-introducing-nushell.md`

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Nu takes heavy inspiration from the [error messages in Rust](https://blog.rust-lang.org/2016/08/10/Shape-of-errors-to-come.html). As much as possible, draw your eyes to the problem.

Combined with the pipeline, some pretty interesting errors are possible:

Title: Nu's Error Messages: Inspiration from Rust

Summary

Nu's error messages are heavily inspired by Rust's, designed to clearly point out the source of the problem. The system is able to trace errors from deep within command pipelines, making debugging easier.