message: AppVeyor: ignore already existing rustup-toolchain-install-master (WTF windows batch makes no sense)
diff: @@ -21,7 +21,7 @@ install:
  - rustup-init.exe -y --default-host %TARGET% --default-toolchain stable
  - set PATH=%USERPROFILE%\.cargo\bin;%PATH%
  # Install "master" toolchain
  - - cargo install rustup-toolchain-install-master
  + - cargo install rustup-toolchain-install-master & exit 0
  - set /p RUSTC_HASH=<rust-version
  - rustup-toolchain-install-master -f -n master %RUSTC_HASH% -c cargo -c rust-src
  - rustup default master
  