message: AppVeyor: abort early if a job fails
diff: @@ -12,6 +12,9 @@ branches:
  - auto
  - try
  +matrix:
  + fast_finish: true # set this flag to immediately finish build once one of the jobs fails.
  +
  cache:
  - '%USERPROFILE%\.cargo'
  - '%USERPROFILE%\.rustup'
  