[INFO] cloning repository https://github.com/Tantatorn-dev/learn-tokio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tantatorn-dev/learn-tokio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTantatorn-dev%2Flearn-tokio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTantatorn-dev%2Flearn-tokio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 133a17304476cc122392e5d2e1cc5ae0b6b2cb7e
[INFO] checking Tantatorn-dev/learn-tokio against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTantatorn-dev%2Flearn-tokio" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tantatorn-dev/learn-tokio on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tantatorn-dev/learn-tokio
[INFO] finished tweaking git repo https://github.com/Tantatorn-dev/learn-tokio
[INFO] tweaked toml for git repo https://github.com/Tantatorn-dev/learn-tokio written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Tantatorn-dev/learn-tokio already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mini-redis v0.4.0
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4ac42a6e1dbd2bf480f7cba5d3ba963cde9a6f7ec99ff3da7d228f65a9ee3c9f
[INFO] running `Command { std: "docker" "start" "-a" "4ac42a6e1dbd2bf480f7cba5d3ba963cde9a6f7ec99ff3da7d228f65a9ee3c9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ac42a6e1dbd2bf480f7cba5d3ba963cde9a6f7ec99ff3da7d228f65a9ee3c9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ac42a6e1dbd2bf480f7cba5d3ba963cde9a6f7ec99ff3da7d228f65a9ee3c9f", kill_on_drop: false }`
[INFO] [stdout] 4ac42a6e1dbd2bf480f7cba5d3ba963cde9a6f7ec99ff3da7d228f65a9ee3c9f
[INFO] running `Command { std: "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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff9074923d412d2eeaac255ee5357cfdaa5304c896597f39b57a12e197b76088
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ff9074923d412d2eeaac255ee5357cfdaa5304c896597f39b57a12e197b76088", kill_on_drop: false }`
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling tokio v1.8.1
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking sharded-slab v0.1.1
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.7
[INFO] [stderr]    Compiling async-stream-impl v0.3.2
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking async-stream v0.3.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking pin-project v1.0.7
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.19
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking tokio-stream v0.1.6
[INFO] [stderr]     Checking mini-redis v0.4.0
[INFO] [stderr]     Checking learn-tokio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `mini_redis::client`
[INFO] [stdout]  --> src/bin/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use mini_redis::client;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `mini_redis::client`
[INFO] [stdout]  --> src/bin/client.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use mini_redis::client;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Get`
[INFO] [stdout]  --> src/bin/client.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Get { key: String },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Set`
[INFO] [stdout]  --> src/bin/client.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Set { key: String, val: Bytes },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Get`
[INFO] [stdout]  --> src/bin/client.rs:8:2
[INFO] [stdout]   |
[INFO] [stdout] 8 |     Get { key: String },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Set`
[INFO] [stdout]  --> src/bin/client.rs:9:2
[INFO] [stdout]   |
[INFO] [stdout] 9 |     Set { key: String, val: Bytes },
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/client.rs:18:3
[INFO] [stdout]    |
[INFO] [stdout] 18 |         tx.send("sending from first handle").await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/client.rs:18:3
[INFO] [stdout]    |
[INFO] [stdout] 18 |         tx.send("sending from first handle").await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/client.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 |         tx2.send("sending from second handle").await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/client.rs:22:3
[INFO] [stdout]    |
[INFO] [stdout] 22 |         tx2.send("sending from second handle").await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.01s
[INFO] running `Command { std: "docker" "inspect" "ff9074923d412d2eeaac255ee5357cfdaa5304c896597f39b57a12e197b76088", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff9074923d412d2eeaac255ee5357cfdaa5304c896597f39b57a12e197b76088", kill_on_drop: false }`
[INFO] [stdout] ff9074923d412d2eeaac255ee5357cfdaa5304c896597f39b57a12e197b76088