Fixes for Redox Path handling

Author: jackpot51

src/libstd/path.rs

@@ -327,11 +327,6 @@ unsafe fn u8_slice_as_os_str(s: &[u8]) -> &OsStr {
     &*(s as *const [u8] as *const OsStr)
 }
 
-// Detect scheme on Redox
-fn has_redox_scheme(s: &[u8]) -> bool {
-    cfg!(target_os = "redox") && s.split(|b| *b == b'/').next().unwrap_or(b"").contains(&b':')
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // Cross-platform, iterator-independent parsing
 ////////////////////////////////////////////////////////////////////////////////
@@ -1798,12 +1793,7 @@ impl Path {
     #[stable(feature = "rust1", since = "1.0.0")]
     #[allow(deprecated)]
     pub fn is_absolute(&self) -> bool {
-        if cfg!(target_os = "redox") {
-            // FIXME: Allow Redox prefixes
-            self.has_root() || has_redox_scheme(self.as_u8_slice())
-        } else {
-            self.has_root() && (cfg!(unix) || self.prefix().is_some())
-        }
+        self.has_root() && (cfg!(unix) || self.prefix().is_some())
     }
 
     /// Returns `true` if the `Path` is relative, i.e. not absolute.
@@ -2206,8 +2196,7 @@ impl Path {
         Components {
             path: self.as_u8_slice(),
             prefix,
-            has_physical_root: has_physical_root(self.as_u8_slice(), prefix) ||
-                               has_redox_scheme(self.as_u8_slice()),
+            has_physical_root: has_physical_root(self.as_u8_slice(), prefix),
             front: State::Prefix,
             back: State::Body,
         }