[INFO] cloning repository https://github.com/Jibbril/rust-observer-async-test
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Jibbril/rust-observer-async-test" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJibbril%2Frust-observer-async-test", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJibbril%2Frust-observer-async-test'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d6c5f67bf5fd781beff30ded6bd7b4239572480
[INFO] checking Jibbril/rust-observer-async-test/2d6c5f67bf5fd781beff30ded6bd7b4239572480 against try#52ae2445414b2a196b318d85c2819995c6e5f1aa for pr-133397
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJibbril%2Frust-observer-async-test" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Jibbril/rust-observer-async-test on toolchain 52ae2445414b2a196b318d85c2819995c6e5f1aa
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Jibbril/rust-observer-async-test
[INFO] finished tweaking git repo https://github.com/Jibbril/rust-observer-async-test
[INFO] tweaked toml for git repo https://github.com/Jibbril/rust-observer-async-test written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Jibbril/rust-observer-async-test 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" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f711c6bf09d81aaba337fc2ed0435d2b85a9212a5121fdf0db6e052123110efe
[INFO] running `Command { std: "docker" "start" "-a" "f711c6bf09d81aaba337fc2ed0435d2b85a9212a5121fdf0db6e052123110efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f711c6bf09d81aaba337fc2ed0435d2b85a9212a5121fdf0db6e052123110efe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f711c6bf09d81aaba337fc2ed0435d2b85a9212a5121fdf0db6e052123110efe", kill_on_drop: false }`
[INFO] [stdout] f711c6bf09d81aaba337fc2ed0435d2b85a9212a5121fdf0db6e052123110efe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94843115b01faa6462b744c111df50225402e525a3fd38a3b68816743cf8d891
[INFO] running `Command { std: "docker" "start" "-a" "94843115b01faa6462b744c111df50225402e525a3fd38a3b68816743cf8d891", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling futures-task v0.3.28
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[INFO] [stderr]     Checking smallvec v1.11.1
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling anyhow v1.0.75
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[INFO] [stderr]    Compiling lock_api v0.4.10
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[INFO] [stderr]    Compiling syn v2.0.38
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[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/scoreboard.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct ScoreBoard {
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 6 |     pub id: u64,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ScoreBoard` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/random_generator.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct RandomGenerator {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] 10 |     pub id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RandomGenerator` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]  --> src/scoreboard.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct ScoreBoard {
[INFO] [stdout]   |            ---------- field in this struct
[INFO] [stdout] 6 |     pub id: u64,
[INFO] [stdout]   |         ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ScoreBoard` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/random_generator.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub struct RandomGenerator {
[INFO] [stdout]    |            --------------- field in this struct
[INFO] [stdout] 10 |     pub id: u64,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RandomGenerator` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.66s
[INFO] running `Command { std: "docker" "inspect" "94843115b01faa6462b744c111df50225402e525a3fd38a3b68816743cf8d891", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94843115b01faa6462b744c111df50225402e525a3fd38a3b68816743cf8d891", kill_on_drop: false }`
[INFO] [stdout] 94843115b01faa6462b744c111df50225402e525a3fd38a3b68816743cf8d891