[INFO] updating cached repository https://github.com/bschwind/mqtt-broker
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/bschwind/mqtt-broker
[INFO] [stderr]  - [deleted]         (none)     -> topic-filters
[INFO] [stderr]    0aff95b..2a9732e  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2a9732ec898f0895fa9005079bad2fb43c33d26c
[INFO] checking bschwind/mqtt-broker against master#73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de for pr-68325
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbschwind%2Fmqtt-broker" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bschwind/mqtt-broker on toolchain 73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de
[INFO] running `"/workspace/cargo-home/bin/cargo" "+73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bschwind/mqtt-broker
[INFO] finished tweaking git repo https://github.com/bschwind/mqtt-broker
[INFO] tweaked toml for git repo https://github.com/bschwind/mqtt-broker written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/bschwind/mqtt-broker already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+73f76b74efcaf21bd5424d87c66cd6ed7fe5c7de" "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] 000e93f0763403cc5f19664acf104dbf2f05d1afdb7f22f4c82124cc1902871e
[INFO] running `"docker" "start" "-a" "000e93f0763403cc5f19664acf104dbf2f05d1afdb7f22f4c82124cc1902871e"`
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]    Compiling toml v0.5.5
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking tokio v0.2.6
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling proc-macro-crate v0.1.4
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]    Compiling derivative v1.0.3
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling num_enum_derive v0.4.2
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking num_enum v0.4.2
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking mqtt-broker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `sender`
[INFO] [stderr]    --> src/broker.rs:139:13
[INFO] [stderr]     |
[INFO] [stderr] 139 |         let sender = broker.sender();
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_sender`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `protocol_version`
[INFO] [stderr]   --> src/client.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     protocol_version: ProtocolVersion,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/topic/tree.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `protocol_version`
[INFO] [stderr]   --> src/client.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     protocol_version: ProtocolVersion,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sender`
[INFO] [stderr]    --> src/broker.rs:139:13
[INFO] [stderr]     |
[INFO] [stderr] 139 |         let sender = broker.sender();
[INFO] [stderr]     |             ^^^^^^ help: consider prefixing with an underscore: `_sender`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Publish`
[INFO] [stderr]   --> src/broker.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     Publish,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Disconnect`
[INFO] [stderr]   --> src/broker.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     Disconnect(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `protocol_version`
[INFO] [stderr]   --> src/client.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     protocol_version: ProtocolVersion,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `filter`
[INFO] [stderr]    --> src/topic/filter.rs:193:5
[INFO] [stderr]     |
[INFO] [stderr] 193 |     fn filter(&'a self) -> &'a str {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `levels`
[INFO] [stderr]    --> src/topic/filter.rs:202:5
[INFO] [stderr]     |
[INFO] [stderr] 202 |     pub fn levels(&'a self) -> TopicLevels<'a> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `levels`
[INFO] [stderr]    --> src/topic/filter.rs:208:5
[INFO] [stderr]     |
[INFO] [stderr] 208 |     pub fn levels(&'a self) -> TopicLevels<'a> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/topic/tree.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     pub fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/topic/tree.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn insert(&mut self, topic_filter: &TopicFilter, value: T) -> u64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `matching_subscribers`
[INFO] [stderr]   --> src/topic/tree.rs:33:5
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn matching_subscribers<'a, F: FnMut(&T)>(&'a self, topic: &Topic, sub_fn: F) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]   --> src/topic/tree.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn remove(&mut self, topic_filter: &TopicFilter, counter: u64) -> Option<T> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/topic/tree.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/topic/tree.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/topic/tree.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/topic/tree.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn insert(&mut self, topic_filter: &TopicFilter, value: T, counter: u64) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]    --> src/topic/tree.rs:113:5
[INFO] [stderr]     |
[INFO] [stderr] 113 |     fn remove(&mut self, topic_filter: &TopicFilter, counter: u64) -> Option<T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `matching_subscribers`
[INFO] [stderr]    --> src/topic/tree.rs:202:5
[INFO] [stderr]     |
[INFO] [stderr] 202 |     fn matching_subscribers<'a, F: FnMut(&T)>(&'a self, topic: &Topic, mut sub_fn: F) {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `property_type`
[INFO] [stderr]    --> src/types.rs:491:9
[INFO] [stderr]     |
[INFO] [stderr] 491 |         pub fn property_type(&self) -> PropertyType {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Publish`
[INFO] [stderr]   --> src/broker.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     Publish,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Disconnect`
[INFO] [stderr]   --> src/broker.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     Disconnect(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `protocol_version`
[INFO] [stderr]   --> src/client.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     protocol_version: ProtocolVersion,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `property_type`
[INFO] [stderr]    --> src/types.rs:491:9
[INFO] [stderr]     |
[INFO] [stderr] 491 |         pub fn property_type(&self) -> PropertyType {
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 54.49s
[INFO] running `"docker" "inspect" "000e93f0763403cc5f19664acf104dbf2f05d1afdb7f22f4c82124cc1902871e"`
[INFO] running `"docker" "rm" "-f" "000e93f0763403cc5f19664acf104dbf2f05d1afdb7f22f4c82124cc1902871e"`
[INFO] [stdout] 000e93f0763403cc5f19664acf104dbf2f05d1afdb7f22f4c82124cc1902871e