upgrade rust to 1.37 (solana-labs#5611)

.travis.yml

@@ -4,7 +4,7 @@ os:
 language: rust
 cache: cargo
 rust:
-  - 1.36.0
+  - 1.37.0
 
 install:
   - source ci/rust-version.sh

README.md

@@ -78,7 +78,7 @@ $ source $HOME/.cargo/env
 $ rustup component add rustfmt
 ```
 
-If your rustc version is lower than 1.36.0, please update it:
+If your rustc version is lower than 1.37.0, please update it:
 
 ```bash
 $ rustup update
@@ -240,5 +240,3 @@ problem is solved by this code?" On the other hand, if a test does fail and you
 better way to solve the same problem, a Pull Request with your solution would most certainly be
 welcome! Likewise, if rewriting a test can better communicate what code it's protecting, please
 send us that patch!
-
-

ci/docker-rust/Dockerfile

@@ -1,6 +1,6 @@
 # Note: when the rust version is changed also modify
 # ci/rust-version.sh to pick up the new image tag
-FROM rust:1.36.0
+FROM rust:1.37.0
 
 # Add Google Protocol Buffers for Libra's metrics library.
 ENV PROTOC_VERSION 3.8.0
@@ -10,17 +10,14 @@ RUN set -x \
  && apt update \
  && apt-get install apt-transport-https \
  && echo deb https://apt.buildkite.com/buildkite-agent stable main > /etc/apt/sources.list.d/buildkite-agent.list \
- && echo deb http://apt.llvm.org/stretch/ llvm-toolchain-stretch-7 main > /etc/apt/sources.list.d/llvm.list \
  && apt-key adv --no-tty --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 32A37959C2FA5C3C99EFBC32A79206696452D198 \
- && wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - \
  && apt update \
  && apt install -y \
       buildkite-agent \
       clang-7 \
       cmake \
       lcov \
       libclang-common-7-dev \
-      llvm-7 \
       mscgen \
       rsync \
       sudo \

ci/rust-version.sh

@@ -13,8 +13,8 @@
 #   $ source ci/rust-version.sh
 #
 
-stable_version=1.36.0
-nightly_version=2019-07-19
+stable_version=1.37.0
+nightly_version=2019-08-21
 
 export rust_stable="$stable_version"
 export rust_stable_docker_image=solanalabs/rust:"$stable_version"

ci/test-checks.sh

@@ -18,7 +18,7 @@ _ cargo +"$rust_stable" clippy --version
 _ cargo +"$rust_stable" clippy --all --exclude solana-sdk-c -- --deny=warnings
 _ cargo +"$rust_stable" clippy --manifest-path sdk-c/Cargo.toml -- --deny=warnings
 
-_ cargo +"$rust_stable" audit --version
+# _ cargo +"$rust_stable" audit --version ### cargo-audit stopped supporting --version??  https://github.com/RustSec/cargo-audit/issues/100
 _ cargo +"$rust_stable" audit
 _ ci/nits.sh
 _ ci/order-crates-for-publishing.py

core/src/banking_stage.rs

@@ -198,6 +198,7 @@ impl BankingStage {
             if processed < verified_txs_len {
                 let next_leader = poh_recorder.lock().unwrap().next_slot_leader();
                 // Walk thru rest of the transactions and filter out the invalid (e.g. too old) ones
+                #[allow(clippy::while_let_on_iterator)]
                 while let Some((msgs, unprocessed_indexes)) = buffered_packets_iter.next() {
                     let unprocessed_indexes = Self::filter_unprocessed_packets(
                         &bank,
@@ -849,6 +850,7 @@ impl BankingStage {
             if processed < verified_txs_len {
                 let next_leader = poh.lock().unwrap().next_slot_leader();
                 // Walk thru rest of the transactions and filter out the invalid (e.g. too old) ones
+                #[allow(clippy::while_let_on_iterator)]
                 while let Some((msgs, vers)) = mms_iter.next() {
                     let packet_indexes = Self::generate_packet_indexes(vers);
                     let unprocessed_indexes = Self::filter_unprocessed_packets(

core/src/replicator.rs

@@ -46,7 +46,7 @@ use std::sync::{Arc, RwLock};
 use std::thread::{sleep, spawn, JoinHandle};
 use std::time::Duration;
 
-static ENCRYPTED_FILENAME: &'static str = "ledger.enc";
+static ENCRYPTED_FILENAME: &str = "ledger.enc";
 
 #[derive(Serialize, Deserialize)]
 pub enum ReplicatorRequest {

core/src/rpc_pubsub.rs

@@ -11,6 +11,7 @@ use solana_sdk::signature::Signature;
 use solana_sdk::transaction;
 use std::sync::{atomic, Arc};
 
+#[allow(clippy::needless_return)] // TODO remove me when rpc is updated?
 #[rpc(server)]
 pub trait RpcSolPubSub {
     type Metadata;

core/src/validator.rs

@@ -72,11 +72,11 @@ impl Default for ValidatorConfig {
 
 #[derive(Default)]
 pub struct ValidatorExit {
-    exits: Vec<Box<FnOnce() + Send + Sync>>,
+    exits: Vec<Box<dyn FnOnce() + Send + Sync>>,
 }
 
 impl ValidatorExit {
-    pub fn register_exit(&mut self, exit: Box<FnOnce() -> () + Send + Sync>) {
+    pub fn register_exit(&mut self, exit: Box<dyn FnOnce() -> () + Send + Sync>) {
         self.exits.push(exit);
     }
 

runtime/src/accounts_index.rs

@@ -115,9 +115,9 @@ impl<T: Clone> AccountsIndex<T> {
             );
             fork_vec.retain(|(fork, _)| !Self::can_purge(max_root, *fork));
 
-            return None;
+            None
         } else {
-            return Some(account_info);
+            Some(account_info)
         }
     }