Elm's compiler has some incredibly good error messages: https://elm-lang.org/blog/compilers-as-assistants (contextual, relevant and written for mere mortals!)
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Co-Authored-By: An old Stack Overflow answer, blindly accepting the compiler's suggestions, and a linter.
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I would have thought that invoking a C compiler would be a solved problem. Looking at Rust's cc crate there's a remarkable long tail of corner cases to fix.
Exotic CPUs, microarchitectures, compiler differences, operating system differences, etc.
Today I learnt that `cargo fix` won't fix code with compiler errors by default, but you can override this!
$ cargo fix --broken-code --allow-dirty && cargo clippy --fix --allow-dirty
This incantation does exactly what I wanted :)