message: profiles: catch invalid 'inherits' use on root profile
diff: @@ -186,6 +186,15 @@ impl Profiles {
  }
  match name.as_str() {
  "dev" | "release" => {
  + match &profile.inherits {
  + None => {}
  + Some(_) => {
  + failure::bail!(
  + "An 'inherits' must not specified root profile '{}'",
  + name
  + );
  + }
  + }
  continue;
  }
  _ => {}
  