core, rustc: Warning police

3 files changed, 4 insertions, 4 deletions

diff --git a/src/libcore/rt/io/stdio.rs b/src/libcore/rt/io/stdio.rs
index 21989f5e873..26950986f7a 100644
--- a/src/libcore/rt/io/stdio.rs
+++ b/src/libcore/rt/io/stdio.rs
@@ -17,9 +17,9 @@ pub fn stdout() -> StdWriter { fail!() }
 
 pub fn stderr() -> StdReader { fail!() }
 
-pub fn print(s: &str) { fail!() }
+pub fn print(_s: &str) { fail!() }
 
-pub fn println(s: &str) { fail!() }
+pub fn println(_s: &str) { fail!() }
 
 pub enum StdStream {
     StdIn,
diff --git a/src/libcore/rt/uvio.rs b/src/libcore/rt/uvio.rs
index d4e547de383..7bf1792baf4 100644
--- a/src/libcore/rt/uvio.rs
+++ b/src/libcore/rt/uvio.rs
@@ -11,7 +11,7 @@
 use option::*;
 use result::*;
 
-use super::io::net::ip::{IpAddr, Ipv4};
+use super::io::net::ip::{IpAddr, Ipv4}; // n.b. Ipv4 is used only in tests
 use super::uv::*;
 use super::rtio::*;
 use ops::Drop;
diff --git a/src/libcore/task/spawn.rs b/src/libcore/task/spawn.rs
index d872d38a278..43fdee67b7a 100644
--- a/src/libcore/task/spawn.rs
+++ b/src/libcore/task/spawn.rs
@@ -549,7 +549,7 @@ pub fn spawn_raw(opts: TaskOpts, f: ~fn()) {
     }
 }
 
-fn spawn_raw_newsched(opts: TaskOpts, f: ~fn()) {
+fn spawn_raw_newsched(_opts: TaskOpts, f: ~fn()) {
     use rt::sched::*;
 
     let mut sched = local_sched::take();