message: latest rust nightly contains all the bits needed to re-compile libstd
diff: @@ -61,6 +61,8 @@ miri hits a call to such a function, execution terminates. To fix this, it is
  possible to compile libstd with full MIR:
  ```sh
  +rustup component add rust-src
  +chmod +x -R ~/.rustup/toolchains/*/lib/rustlib/src/rust/src/jemalloc/include/jemalloc/
  cargo install xargo
  cd xargo/
  RUSTFLAGS='-Zalways-encode-mir' xargo build --target `rustc -vV | egrep '^host: ' | sed 's/^host: //'`
  @@ -73,8 +75,7 @@ cargo run --bin miri -- --sysroot ~/.xargo/HOST tests/run-pass/vecs.rs
  ```
  Notice that you will have to re-run the last step of the preparations above when
  -your toolchain changes (e.g., when you update the nightly). Also, xargo doesn't
  -currently work with nightlies newer than 2017-04-23.
  +your toolchain changes (e.g., when you update the nightly).
  ## Contributing and getting help
  