[INFO] cloning repository https://github.com/esemeniuc/redis-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/esemeniuc/redis-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesemeniuc%2Fredis-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesemeniuc%2Fredis-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9d49c4334c2b52e7636bf981dbb23e3ee47f9927
[INFO] checking esemeniuc/redis-demo against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fesemeniuc%2Fredis-demo" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/esemeniuc/redis-demo on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/esemeniuc/redis-demo
[INFO] finished tweaking git repo https://github.com/esemeniuc/redis-demo
[INFO] tweaked toml for git repo https://github.com/esemeniuc/redis-demo written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/esemeniuc/redis-demo already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded redis v0.23.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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_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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85b9dbe7b985b76f95f1b1555b29f61feba1117692161211c7bb305f5f87f09c
[INFO] running `Command { std: "docker" "start" "-a" "85b9dbe7b985b76f95f1b1555b29f61feba1117692161211c7bb305f5f87f09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85b9dbe7b985b76f95f1b1555b29f61feba1117692161211c7bb305f5f87f09c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85b9dbe7b985b76f95f1b1555b29f61feba1117692161211c7bb305f5f87f09c", kill_on_drop: false }`
[INFO] [stdout] 85b9dbe7b985b76f95f1b1555b29f61feba1117692161211c7bb305f5f87f09c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3cf0a17bb4002e9a840d53ae9a31ed929d49d2374ee53ae9d30f5ddad4b0d69
[INFO] running `Command { std: "docker" "start" "-a" "b3cf0a17bb4002e9a840d53ae9a31ed929d49d2374ee53ae9d30f5ddad4b0d69", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking num_cpus v1.15.0
[INFO] [stderr]     Checking mio v0.8.8
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]    Compiling slab v0.4.8
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling openssl v0.10.55
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling async-trait v0.1.68
[INFO] [stderr]     Checking futures-io v0.3.28
[INFO] [stderr]     Checking log v0.4.19
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling rustix v0.37.20
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking percent-encoding v2.3.0
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]     Checking form_urlencoded v1.2.0
[INFO] [stderr]     Checking aho-corasick v1.0.2
[INFO] [stderr]     Checking arc-swap v1.6.0
[INFO] [stderr]     Checking retain_mut v0.1.9
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking regex-syntax v0.7.2
[INFO] [stderr]    Compiling openssl-sys v0.9.90
[INFO] [stderr]     Checking termcolor v1.2.0
[INFO] [stderr]     Checking url v2.4.0
[INFO] [stderr]    Compiling native-tls v0.2.11
[INFO] [stderr]     Checking regex v1.8.4
[INFO] [stderr]     Checking is-terminal v0.4.7
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]     Checking futures-executor v0.3.28
[INFO] [stderr]     Checking futures v0.3.28
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-native-tls v0.3.1
[INFO] [stderr]     Checking deadpool-runtime v0.1.2
[INFO] [stderr]     Checking deadpool v0.9.5
[INFO] [stderr]     Checking combine v4.6.6
[INFO] [stderr]     Checking redis v0.23.0
[INFO] [stderr]     Checking deadpool-redis v0.12.0
[INFO] [stderr]     Checking redis-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `size_of_val`, `size_of`
[INFO] [stdout]  --> src/main.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::{size_of, size_of_val};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `size_of_val`, `size_of`
[INFO] [stdout]  --> src/main.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::{size_of, size_of_val};
[INFO] [stdout]   |                ^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Msg`
[INFO] [stdout]  --> src/main.rs:4:44
[INFO] [stdout]   |
[INFO] [stdout] 4 | use redis::{AsyncCommands, ConnectionLike, Msg, RedisResult};
[INFO] [stdout]   |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `redis::aio::Connection`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use redis::aio::Connection;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Msg`
[INFO] [stdout]  --> src/main.rs:4:44
[INFO] [stdout]   |
[INFO] [stdout] 4 | use redis::{AsyncCommands, ConnectionLike, Msg, RedisResult};
[INFO] [stdout]   |                                            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromRedisValue`
[INFO] [stdout]   --> src/main.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 | use deadpool_redis::{redis::{cmd, FromRedisValue}, Config, Runtime};
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `redis::aio::Connection`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use redis::aio::Connection;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `FromRedisValue`
[INFO] [stdout]   --> src/main.rs:12:35
[INFO] [stdout]    |
[INFO] [stdout] 12 | use deadpool_redis::{redis::{cmd, FromRedisValue}, Config, Runtime};
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut cfg = Config::from_url("rediss://127.0.0.1/");
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let mut cfg = Config::from_url("rediss://127.0.0.1/");
[INFO] [stdout]    |         ----^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deadpool` is never used
[INFO] [stdout]   --> src/main.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | async fn deadpool() {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `benchmark` is never used
[INFO] [stdout]    --> src/main.rs:121:10
[INFO] [stdout]     |
[INFO] [stdout] 121 | async fn benchmark() -> RedisResult<()> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `deadpool` is never used
[INFO] [stdout]   --> src/main.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | async fn deadpool() {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `benchmark` is never used
[INFO] [stdout]    --> src/main.rs:121:10
[INFO] [stdout]     |
[INFO] [stdout] 121 | async fn benchmark() -> RedisResult<()> {
[INFO] [stdout]     |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         dbg!(msg.get_channel::<String>());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:104:9
[INFO] [stdout]     |
[INFO] [stdout] 104 |         dbg!(msg.get_channel::<String>());
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.35s
[INFO] running `Command { std: "docker" "inspect" "b3cf0a17bb4002e9a840d53ae9a31ed929d49d2374ee53ae9d30f5ddad4b0d69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3cf0a17bb4002e9a840d53ae9a31ed929d49d2374ee53ae9d30f5ddad4b0d69", kill_on_drop: false }`
[INFO] [stdout] b3cf0a17bb4002e9a840d53ae9a31ed929d49d2374ee53ae9d30f5ddad4b0d69