2 files changed, 18 insertions, 11 deletions
diff --git a/src/libstd/sys/windows/os.rs b/src/libstd/sys/windows/os.rs
index 167db1e8ac2..1ebd4c571ac 100644
--- a/src/libstd/sys/windows/os.rs
+++ b/src/libstd/sys/windows/os.rs
@@ -16,7 +16,7 @@ use prelude::v1::*;
 use os::windows::prelude::*;
 
 use error::Error as StdError;
-use ffi::{OsString, OsStr, AsOsStr};
+use ffi::{OsString, OsStr};
 use fmt;
 use io;
 use libc::types::os::arch::extra::LPWCH;
@@ -199,13 +199,13 @@ impl<'a> Iterator for SplitPaths<'a> {
 pub struct JoinPathsError;
 
 pub fn join_paths<I, T>(paths: I) -> Result<OsString, JoinPathsError>
-    where I: Iterator<Item=T>, T: AsOsStr
+    where I: Iterator<Item=T>, T: AsRef<OsStr>
 {
     let mut joined = Vec::new();
     let sep = b';' as u16;
 
     for (i, path) in paths.enumerate() {
-        let path = path.as_os_str();
+        let path = path.as_ref();
         if i > 0 { joined.push(sep) }
         let v = path.encode_wide().collect::<Vec<u16>>();
         if v.contains(&(b'"' as u16)) {
@@ -245,7 +245,8 @@ pub fn getcwd() -> io::Result<PathBuf> {
 }
 
 pub fn chdir(p: &path::Path) -> io::Result<()> {
-    let mut p = p.as_os_str().encode_wide().collect::<Vec<_>>();
+    let p: &OsStr = p.as_ref();
+    let mut p = p.encode_wide().collect::<Vec<_>>();
     p.push(0);
 
     unsafe {
@@ -361,8 +362,8 @@ pub fn temp_dir() -> PathBuf {
 }
 
 pub fn home_dir() -> Option<PathBuf> {
-    getenv("HOME".as_os_str()).or_else(|| {
-        getenv("USERPROFILE".as_os_str())
+    getenv("HOME".as_ref()).or_else(|| {
+        getenv("USERPROFILE".as_ref())
     }).map(PathBuf::from).or_else(|| unsafe {
         let me = c::GetCurrentProcess();
         let mut token = ptr::null_mut();
diff --git a/src/libstd/sys/windows/process.rs b/src/libstd/sys/windows/process.rs
index 297f6e173ab..2065df4fbe3 100644
--- a/src/libstd/sys/windows/process.rs
+++ b/src/libstd/sys/windows/process.rs
@@ -23,6 +23,7 @@ use mem;
 use old_io::process::{ProcessExit, ExitStatus};
 use old_io::{IoResult, IoError};
 use old_io;
+use fs::PathExt;
 use os;
 use old_path::{BytesContainer, GenericPath};
 use ptr;
@@ -142,14 +143,19 @@ impl Process {
         let program = cfg.env().and_then(|env| {
             for (key, v) in env {
                 if b"PATH" != key.container_as_bytes() { continue }
+                let v = match ::str::from_utf8(v.container_as_bytes()) {
+                    Ok(s) => s,
+                    Err(..) => continue,
+                };
 
                 // Split the value and test each path to see if the
                 // program exists.
-                for path in os::split_paths(v.container_as_bytes()) {
-                    let path = path.join(cfg.program().as_bytes())
+                for path in ::env::split_paths(v) {
+                    let program = str::from_utf8(cfg.program().as_bytes()).unwrap();
+                    let path = path.join(program)
                                    .with_extension(env::consts::EXE_EXTENSION);
                     if path.exists() {
-                        return Some(CString::from_slice(path.as_vec()))
+                        return Some(CString::new(path.to_str().unwrap()).unwrap())
                     }
                 }
                 break
@@ -482,9 +488,9 @@ mod tests {
     #[test]
     fn test_make_command_line() {
         fn test_wrapper(prog: &str, args: &[&str]) -> String {
-            make_command_line(&CString::from_slice(prog.as_bytes()),
+            make_command_line(&CString::new(prog),
                               &args.iter()
-                                   .map(|a| CString::from_slice(a.as_bytes()))
+                                   .map(|a| CString::new(a))
                                    .collect::<Vec<CString>>())
         }