1 files changed, 4 insertions, 4 deletions
diff --git a/src/libsyntax/ext/env.rs b/src/libsyntax/ext/env.rs
index 9fedc4a158e..eb3544e3c5c 100644
--- a/src/libsyntax/ext/env.rs
+++ b/src/libsyntax/ext/env.rs
@@ -30,7 +30,7 @@ pub fn expand_option_env<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[ast::TokenT
         Some(v) => v
     };
 
-    let e = match os::getenv(var[]) {
+    let e = match os::getenv(var.index(&FullRange)) {
       None => {
           cx.expr_path(cx.path_all(sp,
                                    true,
@@ -56,7 +56,7 @@ pub fn expand_option_env<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[ast::TokenT
                                    cx.ident_of("Some")),
                               vec!(cx.expr_str(sp,
                                                token::intern_and_get_ident(
-                                          s[]))))
+                                          s.index(&FullRange)))))
       }
     };
     MacExpr::new(e)
@@ -83,7 +83,7 @@ pub fn expand_env<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[ast::TokenTree])
         None => {
             token::intern_and_get_ident(format!("environment variable `{}` \
                                                  not defined",
-                                                var)[])
+                                                var).index(&FullRange))
         }
         Some(second) => {
             match expr_to_string(cx, second, "expected string literal") {
@@ -106,7 +106,7 @@ pub fn expand_env<'cx>(cx: &'cx mut ExtCtxt, sp: Span, tts: &[ast::TokenTree])
             cx.span_err(sp, msg.get());
             cx.expr_uint(sp, 0)
         }
-        Some(s) => cx.expr_str(sp, token::intern_and_get_ident(s[]))
+        Some(s) => cx.expr_str(sp, token::intern_and_get_ident(s.index(&FullRange)))
     };
     MacExpr::new(e)
 }