[INFO] cloning repository https://github.com/hegde-atri/learning-tokio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hegde-atri/learning-tokio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegde-atri%2Flearning-tokio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegde-atri%2Flearning-tokio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 66ca75292b7abf592a1ad593feb94e92842d9356
[INFO] testing hegde-atri/learning-tokio against 1.79.0 for beta-1.80-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhegde-atri%2Flearning-tokio" "/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/hegde-atri/learning-tokio on toolchain 1.79.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.79.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hegde-atri/learning-tokio
[INFO] finished tweaking git repo https://github.com/hegde-atri/learning-tokio
[INFO] tweaked toml for git repo https://github.com/hegde-atri/learning-tokio written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hegde-atri/learning-tokio 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" "+1.79.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded log v0.4.18
[INFO] [stderr]   Downloaded quote v1.0.28
[INFO] [stderr]   Downloaded simple_logger v4.1.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded unicode-ident v1.0.9
[INFO] [stderr]   Downloaded mio v0.8.7
[INFO] [stderr]   Downloaded syn v2.0.18
[INFO] [stderr]   Downloaded tokio v1.28.2
[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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+1.79.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c942dba626fe3548d78e11e23ef00ae0131e673db649c68bf18da6d065fdb40
[INFO] running `Command { std: "docker" "start" "-a" "8c942dba626fe3548d78e11e23ef00ae0131e673db649c68bf18da6d065fdb40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c942dba626fe3548d78e11e23ef00ae0131e673db649c68bf18da6d065fdb40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c942dba626fe3548d78e11e23ef00ae0131e673db649c68bf18da6d065fdb40", kill_on_drop: false }`
[INFO] [stdout] 8c942dba626fe3548d78e11e23ef00ae0131e673db649c68bf18da6d065fdb40
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+1.79.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 081fc5dd81ea5613d63bb2a829f3091630a2e38fe43d9ec5693e83d2b19329c4
[INFO] running `Command { std: "docker" "start" "-a" "081fc5dd81ea5613d63bb2a829f3091630a2e38fe43d9ec5693e83d2b19329c4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling time-macros v0.2.9
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling mio v0.8.7
[INFO] [stderr]    Compiling syn v2.0.18
[INFO] [stderr]    Compiling time v0.3.21
[INFO] [stderr]    Compiling simple_logger v4.1.0
[INFO] [stderr]    Compiling tokio-macros v2.1.0
[INFO] [stderr]    Compiling learning-tokio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/main.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | async fn run() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]   --> src/main.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn fib(n: u32) -> u32 {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `level1` is never used
[INFO] [stdout]   --> src/main.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | async fn level1() {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `level2` is never used
[INFO] [stdout]   --> src/main.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn level2() {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.03s
[INFO] running `Command { std: "docker" "inspect" "081fc5dd81ea5613d63bb2a829f3091630a2e38fe43d9ec5693e83d2b19329c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "081fc5dd81ea5613d63bb2a829f3091630a2e38fe43d9ec5693e83d2b19329c4", kill_on_drop: false }`
[INFO] [stdout] 081fc5dd81ea5613d63bb2a829f3091630a2e38fe43d9ec5693e83d2b19329c4
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+1.79.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be563feea9a7be23632248f64810c7d32f4eeacabdc18e770b3c978c382d2014
[INFO] running `Command { std: "docker" "start" "-a" "be563feea9a7be23632248f64810c7d32f4eeacabdc18e770b3c978c382d2014", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning-tokio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]   --> src/main.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | async fn run() {
[INFO] [stdout]    |          ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fib` is never used
[INFO] [stdout]   --> src/main.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn fib(n: u32) -> u32 {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `level1` is never used
[INFO] [stdout]   --> src/main.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | async fn level1() {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `level2` is never used
[INFO] [stdout]   --> src/main.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 32 | async fn level2() {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "be563feea9a7be23632248f64810c7d32f4eeacabdc18e770b3c978c382d2014", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be563feea9a7be23632248f64810c7d32f4eeacabdc18e770b3c978c382d2014", kill_on_drop: false }`
[INFO] [stdout] be563feea9a7be23632248f64810c7d32f4eeacabdc18e770b3c978c382d2014
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:dff56e7819e73ed36160586b3445e93eb0be776c16704aeeded9c3fb668b2384" "/opt/rustwide/cargo-home/bin/cargo" "+1.79.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] aa898a891c3e1d6e9764d797dafc7dcfbe5bb1dfd79925df162ddb41d32eabe8
[INFO] running `Command { std: "docker" "start" "-a" "aa898a891c3e1d6e9764d797dafc7dcfbe5bb1dfd79925df162ddb41d32eabe8", kill_on_drop: false }`
[INFO] [stderr] warning: function `run` is never used
[INFO] [stderr]   --> src/main.rs:14:10
[INFO] [stderr]    |
[INFO] [stderr] 14 | async fn run() {
[INFO] [stderr]    |          ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `fib` is never used
[INFO] [stderr]   --> src/main.rs:18:4
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn fib(n: u32) -> u32 {
[INFO] [stderr]    |    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `level1` is never used
[INFO] [stderr]   --> src/main.rs:26:10
[INFO] [stderr]    |
[INFO] [stderr] 26 | async fn level1() {
[INFO] [stderr]    |          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `level2` is never used
[INFO] [stderr]   --> src/main.rs:32:10
[INFO] [stderr]    |
[INFO] [stderr] 32 | async fn level2() {
[INFO] [stderr]    |          ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-tokio` (bin "learning-tokio" test) generated 4 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learning_tokio-d5228f1a946f39ad)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "aa898a891c3e1d6e9764d797dafc7dcfbe5bb1dfd79925df162ddb41d32eabe8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa898a891c3e1d6e9764d797dafc7dcfbe5bb1dfd79925df162ddb41d32eabe8", kill_on_drop: false }`
[INFO] [stdout] aa898a891c3e1d6e9764d797dafc7dcfbe5bb1dfd79925df162ddb41d32eabe8