message: Stage 2 seems to be required after all
  Reverts most of
diff: @@ -148,15 +148,15 @@ cd rustc
  ./x.py setup compiler
  # Now edit `config.toml` and under `[rust]` set `debug-assertions = true`.
  -# Build a stage 1 rustc, and build the rustc libraries with that rustc.
  +# Build a stage 2 rustc, and build the rustc libraries with that rustc.
  # This step can take 30 minutes or more.
  -./x.py build --stage 1 compiler/rustc
  +./x.py build --stage 2 compiler/rustc
  # If you change something, you can get a faster rebuild by doing
  -./x.py build --keep-stage 0 --stage 1 compiler/rustc
  +./x.py build --keep-stage 0 --stage 2 compiler/rustc
  # You may have to change the architecture in the next command
  -rustup toolchain link stage1 build/x86_64-unknown-linux-gnu/stage1
  +rustup toolchain link stage2 build/x86_64-unknown-linux-gnu/stage2
  # Now cd to your Miri directory, then configure rustup
  -rustup override set stage1
  +rustup override set stage2
  ```
  For more information about building and configuring a local compiler,
  