[INFO] fetching crate embedded_redis_client 0.1.0...
[INFO] checking embedded_redis_client-0.1.0 against master#b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd for pr-155499
[INFO] extracting crate embedded_redis_client 0.1.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate embedded_redis_client 0.1.0
[INFO] finished tweaking crates.io crate embedded_redis_client 0.1.0
[INFO] tweaked toml for crates.io crate embedded_redis_client 0.1.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate embedded_redis_client 0.1.0 on toolchain b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] a9ce0fab1e62eed4ba1889867c769da4b800d46245d7a61134321ccdb5088274
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b2f1ccf524a3a4cf9c34545167cc23b659cf1cbd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c9c449a57caaf84f10add39954831da12679d569ea0f9717b397c638ecbc5e73
[INFO] running `Command { std: "docker" "start" "-a" "c9c449a57caaf84f10add39954831da12679d569ea0f9717b397c638ecbc5e73", kill_on_drop: false }`
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[INFO] [stderr]     Checking embedded_redis_client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `faulty_client`
[INFO] [stdout]   --> src/embedded_redis_client/embedded_redis_client.rs:59:41
[INFO] [stdout]    |
[INFO] [stdout] 59 |             EmbeddedRedisClient::Faulty(faulty_client) => Err(EmbeddedRedisClientError::new(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_faulty_client`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `faulty_client`
[INFO] [stdout]    --> src/embedded_redis_client/embedded_redis_client.rs:101:49
[INFO] [stdout]     |
[INFO] [stdout] 101 |                     EmbeddedRedisClient::Faulty(faulty_client) => Err(EmbeddedRedisClientError::new(
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_faulty_client`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `faulty_client`
[INFO] [stdout]   --> src/embedded_redis_client/embedded_redis_client.rs:59:41
[INFO] [stdout]    |
[INFO] [stdout] 59 |             EmbeddedRedisClient::Faulty(faulty_client) => Err(EmbeddedRedisClientError::new(
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_faulty_client`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `faulty_client`
[INFO] [stdout]    --> src/embedded_redis_client/embedded_redis_client.rs:101:49
[INFO] [stdout]     |
[INFO] [stdout] 101 |                     EmbeddedRedisClient::Faulty(faulty_client) => Err(EmbeddedRedisClientError::new(
[INFO] [stdout]     |                                                 ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_faulty_client`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `redis_server_ready_to_start`
[INFO] [stdout]   --> src/embedded_redis_server/states/started.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         redis_server_ready_to_start: ReadyToStart,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_redis_server_ready_to_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `settings` is never read
[INFO] [stdout]  --> src/embedded_redis_client/states/faulty.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct FaultyRedisClient {
[INFO] [stdout]   |            ----------------- field in this struct
[INFO] [stdout] 7 |     settings: EmbeddedRedisClientSettings,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `FaultyRedisClient` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_multiplexed_redis_server_connection` is never used
[INFO] [stdout]    --> src/embedded_redis_server/embedded_redis_server.rs:109:18
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub async fn get_multiplexed_redis_server_connection(
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `server_process` is never read
[INFO] [stdout]   --> src/embedded_redis_server/states/ready.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ReadyRedisServerProcess {
[INFO] [stdout]    |            ----------------------- field in this struct
[INFO] [stdout] 10 |     server_process: StartedRedisServerProcess,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `connection` is never read
[INFO] [stdout]  --> src/embedded_redis_server/states/running_in_another_process.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct RedisServerRunningInAnotherProcess {
[INFO] [stdout]   |            ---------------------------------- field in this struct
[INFO] [stdout] 8 |     connection: redis::Connection,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kill_process_occupying_target_tcp_port` is never used
[INFO] [stdout]  --> src/embedded_redis_server/util.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn kill_process_occupying_target_tcp_port(port: u16) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trim_newline` is never used
[INFO] [stdout]   --> src/embedded_redis_server/util.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn trim_newline(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/embedded_redis_client/embedded_redis_client.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 drop(ready_client);
[INFO] [stdout]    |                 ^^^^^------------^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      argument has type `&mut ReadyRedisClient`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 25 -                 drop(ready_client);
[INFO] [stdout] 25 +                 let _ = ready_client;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `redis_server_ready_to_start`
[INFO] [stdout]   --> src/embedded_redis_server/states/started.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |         redis_server_ready_to_start: ReadyToStart,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_redis_server_ready_to_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `settings` is never read
[INFO] [stdout]  --> src/embedded_redis_client/states/faulty.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct FaultyRedisClient {
[INFO] [stdout]   |            ----------------- field in this struct
[INFO] [stdout] 7 |     settings: EmbeddedRedisClientSettings,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `FaultyRedisClient` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_multiplexed_redis_server_connection` is never used
[INFO] [stdout]    --> src/embedded_redis_server/embedded_redis_server.rs:109:18
[INFO] [stdout]     |
[INFO] [stdout] 109 |     pub async fn get_multiplexed_redis_server_connection(
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `server_process` is never read
[INFO] [stdout]   --> src/embedded_redis_server/states/ready.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct ReadyRedisServerProcess {
[INFO] [stdout]    |            ----------------------- field in this struct
[INFO] [stdout] 10 |     server_process: StartedRedisServerProcess,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `connection` is never read
[INFO] [stdout]  --> src/embedded_redis_server/states/running_in_another_process.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub struct RedisServerRunningInAnotherProcess {
[INFO] [stdout]   |            ---------------------------------- field in this struct
[INFO] [stdout] 8 |     connection: redis::Connection,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `kill_process_occupying_target_tcp_port` is never used
[INFO] [stdout]  --> src/embedded_redis_server/util.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn kill_process_occupying_target_tcp_port(port: u16) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `trim_newline` is never used
[INFO] [stdout]   --> src/embedded_redis_server/util.rs:55:4
[INFO] [stdout]    |
[INFO] [stdout] 55 | fn trim_newline(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/embedded_redis_client/embedded_redis_client.rs:25:17
[INFO] [stdout]    |
[INFO] [stdout] 25 |                 drop(ready_client);
[INFO] [stdout]    |                 ^^^^^------------^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      argument has type `&mut ReadyRedisClient`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 25 -                 drop(ready_client);
[INFO] [stdout] 25 +                 let _ = ready_client;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.51s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: redis v0.19.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 11`
[INFO] running `Command { std: "docker" "inspect" "c9c449a57caaf84f10add39954831da12679d569ea0f9717b397c638ecbc5e73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c9c449a57caaf84f10add39954831da12679d569ea0f9717b397c638ecbc5e73", kill_on_drop: false }`
[INFO] [stdout] c9c449a57caaf84f10add39954831da12679d569ea0f9717b397c638ecbc5e73
