Upgrade to Rust 1.34.0 (#3781)

* Upgrade to Rust 1.34.0

* Remove redundant closures

Thanks Clippy!

README.md

@@ -44,7 +44,7 @@ $ source $HOME/.cargo/env
 $ rustup component add rustfmt-preview
 ```
 
-If your rustc version is lower than 1.33.0, please update it:
+If your rustc version is lower than 1.34.0, please update it:
 
 ```bash
 $ rustup update

ci/docker-rust/Dockerfile

@@ -1,6 +1,6 @@
 # Note: when the rust version is changed also modify
 # ci/buildkite.yml to pick up the new image tag
-FROM rust:1.33.0
+FROM rust:1.34.0
 
 RUN set -x \
  && apt update \

ci/rust-version.sh

@@ -13,8 +13,8 @@
 #   $ source ci/rust-version.sh
 #
 
-export rust_stable=1.33.0
-export rust_stable_docker_image=solanalabs/rust:1.33.0
+export rust_stable=1.34.0
+export rust_stable_docker_image=solanalabs/rust:1.34.0
 
 export rust_nightly=nightly-2019-03-14
 export rust_nightly_docker_image=solanalabs/rust-nightly:2019-03-14

core/src/cluster_info.rs

@@ -227,7 +227,7 @@ impl ClusterInfo {
         self.gossip
             .crds
             .lookup(&entry)
-            .and_then(|x| x.contact_info())
+            .and_then(CrdsValue::contact_info)
     }
 
     pub fn my_data(&self) -> ContactInfo {
@@ -847,7 +847,7 @@ impl ClusterInfo {
                 self.gossip
                     .crds
                     .lookup(&peer_label)
-                    .and_then(|v| v.contact_info())
+                    .and_then(CrdsValue::contact_info)
                     .map(|peer_info| (peer, filter, peer_info.gossip, self_info))
             })
             .collect();
@@ -873,7 +873,7 @@ impl ClusterInfo {
                 self.gossip
                     .crds
                     .lookup(&peer_label)
-                    .and_then(|v| v.contact_info())
+                    .and_then(CrdsValue::contact_info)
                     .map(|p| p.gossip)
             })
             .map(|peer| (peer, Protocol::PushMessage(self_id, msgs.clone())))

core/src/entry.rs

@@ -265,7 +265,7 @@ impl EntrySlice for [Entry] {
     }
 
     fn to_single_entry_blobs(&self) -> Vec<Blob> {
-        self.iter().map(|entry| entry.to_blob()).collect()
+        self.iter().map(Entry::to_blob).collect()
     }
 }
 

fullnode/src/main.rs

@@ -229,7 +229,7 @@ fn main() {
         (Some(signer_service), signer_addr)
     };
     let init_complete_file = matches.value_of("init_complete_file");
-    fullnode_config.blockstream = matches.value_of("blockstream").map(|s| s.to_string());
+    fullnode_config.blockstream = matches.value_of("blockstream").map(ToString::to_string);
 
     let keypair = Arc::new(keypair);
     let mut node = Node::new_with_external_ip(&keypair.pubkey(), &gossip_addr, dynamic_port_range);

install/src/main.rs

@@ -213,7 +213,7 @@ fn main() -> Result<(), String> {
             let program_name = matches.value_of("program_name").unwrap();
             let program_arguments = matches
                 .values_of("program_arguments")
-                .map(|iter| iter.collect())
+                .map(Iterator::collect)
                 .unwrap_or_else(|| vec![]);
 
             command::run(config_file, program_name, program_arguments)

runtime/src/accounts.rs

@@ -214,7 +214,7 @@ pub struct Accounts {
 }
 
 fn get_paths_vec(paths: &str) -> Vec<String> {
-    paths.split(',').map(|s| s.to_string()).collect()
+    paths.split(',').map(ToString::to_string).collect()
 }
 
 impl Drop for Accounts {

sdk/src/transaction.rs

@@ -109,7 +109,7 @@ impl Transaction {
     ) -> Self {
         let mut account_keys: Vec<_> = from_keypairs
             .iter()
-            .map(|keypair| keypair.pubkey())
+            .map(|keypair| (*keypair).pubkey())
             .collect();
         account_keys.extend_from_slice(keys);
         let message = Message::new_with_compiled_instructions(