[INFO] fetching crate libraft 0.1.1...
[INFO] checking libraft-0.1.1 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate libraft 0.1.1 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate libraft 0.1.1 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate libraft 0.1.1
[INFO] finished tweaking crates.io crate libraft 0.1.1
[INFO] tweaked toml for crates.io crate libraft 0.1.1 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aaff9f9e6bfc2646650db9727b19d47199c1afa067a9744cf6fcc3fb096057ef
[INFO] running `"docker" "start" "-a" "aaff9f9e6bfc2646650db9727b19d47199c1afa067a9744cf6fcc3fb096057ef"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling protobuf v1.7.5
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking quick-error v1.2.3
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]     Checking libraft v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:70:24
[INFO] [stderr]    |
[INFO] [stderr] 70 |         Other(err: Box<error::Error + Sync + Send>) {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Sync + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:70:24
[INFO] [stderr]    |
[INFO] [stderr] 70 |         Other(err: Box<error::Error + Sync + Send>) {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:245:26
[INFO] [stderr]     |
[INFO] [stderr] 245 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:246:18
[INFO] [stderr]     |
[INFO] [stderr] 246 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:248:38
[INFO] [stderr]     |
[INFO] [stderr] 248 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:249:22
[INFO] [stderr]     |
[INFO] [stderr] 249 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:251:55
[INFO] [stderr]     |
[INFO] [stderr] 251 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:528:26
[INFO] [stderr]     |
[INFO] [stderr] 528 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:529:18
[INFO] [stderr]     |
[INFO] [stderr] 529 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:531:38
[INFO] [stderr]     |
[INFO] [stderr] 531 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:532:22
[INFO] [stderr]     |
[INFO] [stderr] 532 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:534:55
[INFO] [stderr]     |
[INFO] [stderr] 534 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:775:26
[INFO] [stderr]     |
[INFO] [stderr] 775 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:776:18
[INFO] [stderr]     |
[INFO] [stderr] 776 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:778:38
[INFO] [stderr]     |
[INFO] [stderr] 778 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:779:22
[INFO] [stderr]     |
[INFO] [stderr] 779 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:781:55
[INFO] [stderr]     |
[INFO] [stderr] 781 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:999:26
[INFO] [stderr]     |
[INFO] [stderr] 999 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1000:18
[INFO] [stderr]      |
[INFO] [stderr] 1000 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1002:38
[INFO] [stderr]      |
[INFO] [stderr] 1002 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1003:22
[INFO] [stderr]      |
[INFO] [stderr] 1003 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1005:55
[INFO] [stderr]      |
[INFO] [stderr] 1005 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1248:26
[INFO] [stderr]      |
[INFO] [stderr] 1248 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]      |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1249:18
[INFO] [stderr]      |
[INFO] [stderr] 1249 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1251:38
[INFO] [stderr]      |
[INFO] [stderr] 1251 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1252:22
[INFO] [stderr]      |
[INFO] [stderr] 1252 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1254:55
[INFO] [stderr]      |
[INFO] [stderr] 1254 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1875:26
[INFO] [stderr]      |
[INFO] [stderr] 1875 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]      |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1876:18
[INFO] [stderr]      |
[INFO] [stderr] 1876 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1878:38
[INFO] [stderr]      |
[INFO] [stderr] 1878 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1879:22
[INFO] [stderr]      |
[INFO] [stderr] 1879 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1881:55
[INFO] [stderr]      |
[INFO] [stderr] 1881 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2224:26
[INFO] [stderr]      |
[INFO] [stderr] 2224 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]      |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2225:18
[INFO] [stderr]      |
[INFO] [stderr] 2225 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2227:38
[INFO] [stderr]      |
[INFO] [stderr] 2227 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2228:22
[INFO] [stderr]      |
[INFO] [stderr] 2228 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2230:55
[INFO] [stderr]      |
[INFO] [stderr] 2230 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:70:24
[INFO] [stderr]    |
[INFO] [stderr] 70 |         Other(err: Box<error::Error + Sync + Send>) {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Sync + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/errors.rs:70:24
[INFO] [stderr]    |
[INFO] [stderr] 70 |         Other(err: Box<error::Error + Sync + Send>) {
[INFO] [stderr]    |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + Sync + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:245:26
[INFO] [stderr]     |
[INFO] [stderr] 245 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:246:18
[INFO] [stderr]     |
[INFO] [stderr] 246 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:248:38
[INFO] [stderr]     |
[INFO] [stderr] 248 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:249:22
[INFO] [stderr]     |
[INFO] [stderr] 249 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:251:55
[INFO] [stderr]     |
[INFO] [stderr] 251 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:528:26
[INFO] [stderr]     |
[INFO] [stderr] 528 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:529:18
[INFO] [stderr]     |
[INFO] [stderr] 529 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:531:38
[INFO] [stderr]     |
[INFO] [stderr] 531 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:532:22
[INFO] [stderr]     |
[INFO] [stderr] 532 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:534:55
[INFO] [stderr]     |
[INFO] [stderr] 534 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:775:26
[INFO] [stderr]     |
[INFO] [stderr] 775 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:776:18
[INFO] [stderr]     |
[INFO] [stderr] 776 |         self as &::std::any::Any
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:778:38
[INFO] [stderr]     |
[INFO] [stderr] 778 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]     |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:779:22
[INFO] [stderr]     |
[INFO] [stderr] 779 |         self as &mut ::std::any::Any
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:781:55
[INFO] [stderr]     |
[INFO] [stderr] 781 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]     |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/raftpb.rs:999:26
[INFO] [stderr]     |
[INFO] [stderr] 999 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1000:18
[INFO] [stderr]      |
[INFO] [stderr] 1000 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1002:38
[INFO] [stderr]      |
[INFO] [stderr] 1002 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1003:22
[INFO] [stderr]      |
[INFO] [stderr] 1003 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1005:55
[INFO] [stderr]      |
[INFO] [stderr] 1005 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1248:26
[INFO] [stderr]      |
[INFO] [stderr] 1248 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]      |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1249:18
[INFO] [stderr]      |
[INFO] [stderr] 1249 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1251:38
[INFO] [stderr]      |
[INFO] [stderr] 1251 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1252:22
[INFO] [stderr]      |
[INFO] [stderr] 1252 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1254:55
[INFO] [stderr]      |
[INFO] [stderr] 1254 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1875:26
[INFO] [stderr]      |
[INFO] [stderr] 1875 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]      |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1876:18
[INFO] [stderr]      |
[INFO] [stderr] 1876 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1878:38
[INFO] [stderr]      |
[INFO] [stderr] 1878 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1879:22
[INFO] [stderr]      |
[INFO] [stderr] 1879 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:1881:55
[INFO] [stderr]      |
[INFO] [stderr] 1881 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2224:26
[INFO] [stderr]      |
[INFO] [stderr] 2224 |     fn as_any(&self) -> &::std::any::Any {
[INFO] [stderr]      |                          ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2225:18
[INFO] [stderr]      |
[INFO] [stderr] 2225 |         self as &::std::any::Any
[INFO] [stderr]      |                  ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2227:38
[INFO] [stderr]      |
[INFO] [stderr] 2227 |     fn as_any_mut(&mut self) -> &mut ::std::any::Any {
[INFO] [stderr]      |                                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2228:22
[INFO] [stderr]      |
[INFO] [stderr] 2228 |         self as &mut ::std::any::Any
[INFO] [stderr]      |                      ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/raftpb.rs:2230:55
[INFO] [stderr]      |
[INFO] [stderr] 2230 |     fn into_any(self: Box<Self>) -> ::std::boxed::Box<::std::any::Any> {
[INFO] [stderr]      |                                                       ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn (::std::any::Any)`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/raft.rs:1257:17
[INFO] [stderr]      |
[INFO] [stderr] 1257 |                 if let Some(mut m) = more_to_send {
[INFO] [stderr]      |                             ----^
[INFO] [stderr]      |                             |
[INFO] [stderr]      |                             help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/raft.rs:1864:22
[INFO] [stderr]      |
[INFO] [stderr] 1864 |             let (mut matched, mut next) = (0, self.raft_log.last_index() + 1);
[INFO] [stderr]      |                               ----^^^^
[INFO] [stderr]      |                               |
[INFO] [stderr]      |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/raft.rs:1257:17
[INFO] [stderr]      |
[INFO] [stderr] 1257 |                 if let Some(mut m) = more_to_send {
[INFO] [stderr]      |                             ----^
[INFO] [stderr]      |                             |
[INFO] [stderr]      |                             help: remove this `mut`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/raw_node.rs:329:9
[INFO] [stderr]     |
[INFO] [stderr] 329 |         self.raft.step(m).is_ok();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/raw_node.rs:340:9
[INFO] [stderr]     |
[INFO] [stderr] 340 |         self.raft.step(m).is_ok();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/raft.rs:1864:22
[INFO] [stderr]      |
[INFO] [stderr] 1864 |             let (mut matched, mut next) = (0, self.raft_log.last_index() + 1);
[INFO] [stderr]      |                               ----^^^^
[INFO] [stderr]      |                               |
[INFO] [stderr]      |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 41 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/raw_node.rs:329:9
[INFO] [stderr]     |
[INFO] [stderr] 329 |         self.raft.step(m).is_ok();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> src/raw_node.rs:340:9
[INFO] [stderr]     |
[INFO] [stderr] 340 |         self.raft.step(m).is_ok();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]     --> tests/cases/test_raft.rs:2202:9
[INFO] [stderr]      |
[INFO] [stderr] 2202 |     )]);;
[INFO] [stderr]      |         ^ help: remove this semicolon
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]     --> tests/cases/test_raft.rs:2208:9
[INFO] [stderr]      |
[INFO] [stderr] 2208 |     )]);;
[INFO] [stderr]      |         ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]     --> tests/cases/test_raft.rs:2214:9
[INFO] [stderr]      |
[INFO] [stderr] 2214 |     )]);;
[INFO] [stderr]      |         ^ help: remove this semicolon
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Storage`
[INFO] [stderr]  --> tests/cases/test_raft_flow_control.rs:3:36
[INFO] [stderr]   |
[INFO] [stderr] 3 | use libraft::storage::{MemStorage, Storage};
[INFO] [stderr]   |                                    ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 41 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Storage`
[INFO] [stderr]  --> tests/cases/test_raft_snap.rs:2:36
[INFO] [stderr]   |
[INFO] [stderr] 2 | use libraft::storage::{MemStorage, Storage};
[INFO] [stderr]   |                                    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `last_index` is never read
[INFO] [stderr]   --> tests/cases/test_raw_node.rs:72:9
[INFO] [stderr]    |
[INFO] [stderr] 72 |     let mut last_index = 0;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/cases/test_raft.rs:493:13
[INFO] [stderr]     |
[INFO] [stderr] 493 |         let mut p = Progress {
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> tests/cases/test_raft.rs:1583:10
[INFO] [stderr]      |
[INFO] [stderr] 1583 |     for (mut m, wcommit) in tests {
[INFO] [stderr]      |          ----^
[INFO] [stderr]      |          |
[INFO] [stderr]      |          help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> tests/cases/test_raft.rs:2277:13
[INFO] [stderr]      |
[INFO] [stderr] 2277 |         let mut m = new_message_with_entries(
[INFO] [stderr]      |             ----^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> tests/cases/test_raft.rs:2344:13
[INFO] [stderr]      |
[INFO] [stderr] 2344 |         let mut m = new_message_with_entries(
[INFO] [stderr]      |             ----^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> tests/cases/test_raft.rs:2763:13
[INFO] [stderr]      |
[INFO] [stderr] 2763 |         let mut r = new_test_raft(id, peers, 5, 1, MemStorage::new());
[INFO] [stderr]      |             ----^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> tests/cases/test_raft.rs:2776:13
[INFO] [stderr]      |
[INFO] [stderr] 2776 |         let mut r = new_test_raft(1, ids, 10, 1, MemStorage::new());
[INFO] [stderr]      |             ----^
[INFO] [stderr]      |             |
[INFO] [stderr]      |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/cases/test_raft_paper.rs:581:13
[INFO] [stderr]     |
[INFO] [stderr] 581 |         let mut ents = vec![e];
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/cases/test_raft_paper.rs:590:13
[INFO] [stderr]     |
[INFO] [stderr] 590 |         let mut msgs: Vec<Message> = r.msgs.drain(..).collect();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/cases/test_raft_paper.rs:996:13
[INFO] [stderr]     |
[INFO] [stderr] 996 |         let mut msgs: Vec<Message> = r.msgs.drain(..).collect();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> tests/cases/test_raft.rs:526:5
[INFO] [stderr]     |
[INFO] [stderr] 526 |     r.step(new_message(1, 1, MessageType::MsgHeartbeat)).is_ok();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> tests/cases/test_raft.rs:529:5
[INFO] [stderr]     |
[INFO] [stderr] 529 | /     r.step(new_message(2, 1, MessageType::MsgHeartbeatResp))
[INFO] [stderr] 530 | |         .is_ok();
[INFO] [stderr]     | |_________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> tests/cases/test_raft.rs:547:5
[INFO] [stderr]     |
[INFO] [stderr] 547 |     r.step(m.clone()).is_ok();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> tests/cases/test_raft.rs:548:5
[INFO] [stderr]     |
[INFO] [stderr] 548 |     r.step(m.clone()).is_ok();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> tests/cases/test_raft.rs:549:5
[INFO] [stderr]     |
[INFO] [stderr] 549 |     r.step(m).is_ok();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]    --> tests/cases/test_raft.rs:721:9
[INFO] [stderr]     |
[INFO] [stderr] 721 |         storage.append(&vec![e]).is_ok();
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.21s
[INFO] running `"docker" "inspect" "aaff9f9e6bfc2646650db9727b19d47199c1afa067a9744cf6fcc3fb096057ef"`
[INFO] running `"docker" "rm" "-f" "aaff9f9e6bfc2646650db9727b19d47199c1afa067a9744cf6fcc3fb096057ef"`
[INFO] [stdout] aaff9f9e6bfc2646650db9727b19d47199c1afa067a9744cf6fcc3fb096057ef