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Detail how to run locally-built nightly cargo #5533

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May 14, 2018
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Detail how to run locally-built nightly cargo #5533

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5 changes: 4 additions & 1 deletion ARCHITECTURE.md
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Expand Up @@ -106,7 +106,10 @@ assert_that(
Alternatively to build and run a custom version of cargo simply run `cargo build`
and execute `target/debug/cargo`. Note that `+nightly`/`+stable` (and variants),
being [rustup](https://rustup.rs/) features, won't work when executing the locally
built cargo binary directly.
built cargo binary directly, you have to instead build with `cargo +nightly build`
and run with `rustup run` (e.g `rustup run nightly
<path-to-cargo>/target/debug/cargo <args>..`) (or set the `RUSTC` env var to point
to nightly rustc).

Because the test suite has `#![deny(warnings)]` at times you might find it
convenient to override this with `RUSTFLAGS`, for example
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