Fix compilation

Something's changed in Rust: rust-lang/rust#19539

Author: stepancheg

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "protobuf"
-version = "0.0.7"
+version = "0.0.8"
 authors = ["Stepan Koltsov <[email protected]>"]
 license = "MIT/Apache-2.0"
 homepage = "https://github.com/stepancheg/rust-protobuf/"

src/lib/core.rs

@@ -19,7 +19,9 @@ use stream::with_coded_output_stream_to_bytes;
 use error::ProtobufResult;
 
 
-pub trait Message : PartialEq + Clone + Default + fmt::Show + Clear {
+pub trait Message : PartialEq + Default + fmt::Show + Clear {
+    // also all generated Message types implement Clone trait
+
     fn new() -> Self;
     // all required fields set
     fn is_initialized(&self) -> bool;

src/perftest/perftest.rs

@@ -29,7 +29,7 @@ fn measure_and_print<R>(title: &str, iter: u64, f: || -> R) -> R {
     r
 }
 
-fn run_test<M : Message>(name: &str, data: &[M]) {
+fn run_test<M : Message + Clone>(name: &str, data: &[M]) {
     let mut rng: StdRng = SeedableRng::from_seed([10, 20, 30, 40].as_slice());
     let mut random_data: Vec<M> = Vec::new();
 
@@ -81,7 +81,7 @@ struct TestRunner {
 }
 
 impl TestRunner {
-    fn test<M : Message>(&mut self, name: &str, data: &[M]) {
+    fn test<M : Message + Clone>(&mut self, name: &str, data: &[M]) {
         if self.selected.is_none() || name == self.selected.as_ref().unwrap().as_slice() {
             run_test(name, data);
             self.any_matched = true;