diff --git a/src/libcore/ascii.rs b/src/libcore/ascii.rs
index e78dfd1ed4abf..4d10a03f77f84 100644
--- a/src/libcore/ascii.rs
+++ b/src/libcore/ascii.rs
@@ -108,7 +108,7 @@ pub fn escape_default(c: u8) -> EscapeDefault {
 
     fn hexify(b: u8) -> u8 {
         match b {
-            0..=9 => b'0' + b,
+            ..=9 => b'0' + b,
             _ => b'a' + b - 10,
         }
     }
diff --git a/src/libcore/lib.rs b/src/libcore/lib.rs
index 6edf253d4bb80..181c7d64cbb09 100644
--- a/src/libcore/lib.rs
+++ b/src/libcore/lib.rs
@@ -84,6 +84,7 @@
 #![feature(doc_spotlight)]
 #![feature(extern_types)]
 #![feature(fundamental)]
+#![feature(half_open_range_patterns)]
 #![feature(intrinsics)]
 #![feature(try_find)]
 #![feature(is_sorted)]
diff --git a/src/librustc_target/abi/mod.rs b/src/librustc_target/abi/mod.rs
index 3f44339bf4cc2..f3b65560ded1f 100644
--- a/src/librustc_target/abi/mod.rs
+++ b/src/librustc_target/abi/mod.rs
@@ -470,10 +470,10 @@ impl Integer {
     /// Finds the smallest Integer type which can represent the unsigned value.
     pub fn fit_unsigned(x: u128) -> Integer {
         match x {
-            0..=0x0000_0000_0000_00ff => I8,
-            0..=0x0000_0000_0000_ffff => I16,
-            0..=0x0000_0000_ffff_ffff => I32,
-            0..=0xffff_ffff_ffff_ffff => I64,
+            ..=0x0000_0000_0000_00ff => I8,
+            ..=0x0000_0000_0000_ffff => I16,
+            ..=0x0000_0000_ffff_ffff => I32,
+            ..=0xffff_ffff_ffff_ffff => I64,
             _ => I128,
         }
     }
diff --git a/src/librustc_target/lib.rs b/src/librustc_target/lib.rs
index a9db0254a7d11..278a2565e72b4 100644
--- a/src/librustc_target/lib.rs
+++ b/src/librustc_target/lib.rs
@@ -10,6 +10,7 @@
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 #![feature(box_syntax)]
 #![feature(bool_to_option)]
+#![feature(half_open_range_patterns)]
 #![feature(nll)]
 
 #[macro_use]
diff --git a/src/libstd/lib.rs b/src/libstd/lib.rs
index 806f868ff242e..a759f35d630a3 100644
--- a/src/libstd/lib.rs
+++ b/src/libstd/lib.rs
@@ -266,6 +266,7 @@
 #![feature(format_args_nl)]
 #![feature(generator_trait)]
 #![feature(global_asm)]
+#![feature(half_open_range_patterns)]
 #![feature(hash_raw_entry)]
 #![feature(hashmap_internals)]
 #![feature(int_error_internals)]
diff --git a/src/libstd/sys/windows/args.rs b/src/libstd/sys/windows/args.rs
index 5fbea2a291017..73b88c55083ab 100644
--- a/src/libstd/sys/windows/args.rs
+++ b/src/libstd/sys/windows/args.rs
@@ -83,7 +83,7 @@ unsafe fn parse_lp_cmd_line<F: Fn() -> OsString>(
         // "However, if lpCmdLine starts with any amount of whitespace, CommandLineToArgvW
         // will consider the first argument to be an empty string. Excess whitespace at the
         // end of lpCmdLine is ignored."
-        0..=SPACE => {
+        ..=SPACE => {
             ret_val.push(OsString::new());
             &cmd_line[1..]
         }
diff --git a/src/libstd/sys_common/wtf8.rs b/src/libstd/sys_common/wtf8.rs
index 1d96cdfe46042..7d84cde3a0764 100644
--- a/src/libstd/sys_common/wtf8.rs
+++ b/src/libstd/sys_common/wtf8.rs
@@ -66,7 +66,7 @@ impl CodePoint {
     #[inline]
     pub fn from_u32(value: u32) -> Option<CodePoint> {
         match value {
-            0..=0x10FFFF => Some(CodePoint { value }),
+            ..=0x10FFFF => Some(CodePoint { value }),
             _ => None,
         }
     }