Allow absolute if either contains root or a scheme

Author: jackpot51

src/libstd/path.rs

@@ -1691,11 +1691,11 @@ impl Path {
  #[stable(feature = "rust1", since = "1.0.0")]
  #[allow(deprecated)]
  pub fn is_absolute(&self) -> bool {
- if !cfg!(target_os = "redox") {
- self.has_root() && (cfg!(unix) || self.prefix().is_some())
- } else {
+ if cfg!(target_os = "redox") {
  // FIXME: Allow Redox prefixes
- has_redox_scheme(self.as_u8_slice())
+ self.has_root() || has_redox_scheme(self.as_u8_slice())
+ } else {
+ self.has_root() && (cfg!(unix) || self.prefix().is_some())
  }
  }