fix errors on windows.

Author: Centril

src/libstd/io/stdio.rs

@@ -759,7 +759,6 @@ pub fn _print(args: fmt::Arguments<'_>) {
 #[doc(hidden)]
 #[cfg(not(test))]
 pub fn _eprint(args: fmt::Arguments<'_>) {
-    use crate::panicking::LOCAL_STDERR;
     print_to(args, &LOCAL_STDERR, stderr, "stderr");
 }
 

src/libstd/sys/windows/args.rs

@@ -170,7 +170,7 @@ impl<'a> fmt::Debug for ArgsInnerDebug<'a> {
 }
 
 impl Args {
-    pub fn inner_debug(&self) -> ArgsInnerDebug {
+    pub fn inner_debug(&self) -> ArgsInnerDebug<'_> {
         ArgsInnerDebug {
             args: self
         }

src/libstd/sys/windows/os.rs

@@ -136,7 +136,7 @@ pub struct SplitPaths<'a> {
     must_yield: bool,
 }
 
-pub fn split_paths(unparsed: &OsStr) -> SplitPaths {
+pub fn split_paths(unparsed: &OsStr) -> SplitPaths<'_> {
     SplitPaths {
         data: unparsed.encode_wide(),
         must_yield: true,

src/libstd/sys/windows/path.rs

@@ -19,7 +19,7 @@ pub fn is_verbatim_sep(b: u8) -> bool {
     b == b'\\'
 }
 
-pub fn parse_prefix<'a>(path: &'a OsStr) -> Option<Prefix> {
+pub fn parse_prefix<'a>(path: &'a OsStr) -> Option<Prefix<'a>> {
     use crate::path::Prefix::*;
     unsafe {
         // The unsafety here stems from converting between &OsStr and &[u8]