[INFO] cloning repository https://github.com/zamfonato/rust_exercises
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zamfonato/rust_exercises" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzamfonato%2Frust_exercises", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzamfonato%2Frust_exercises'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7220d67648c56ef39d692bea447083efb2917092
[INFO] testing zamfonato/rust_exercises against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzamfonato%2Frust_exercises" "/workspace/builds/worker-86/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-86/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zamfonato/rust_exercises on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zamfonato/rust_exercises
[INFO] finished tweaking git repo https://github.com/zamfonato/rust_exercises
[INFO] tweaked toml for git repo https://github.com/zamfonato/rust_exercises written to /workspace/builds/worker-86/source/Cargo.toml
[INFO] crate git repo https://github.com/zamfonato/rust_exercises already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6bc37e9d65ad6fcb0e7ad5d3d1e433753e342cdd64ed1b3455edc742ec056e7f
[INFO] running `Command { std: "docker" "start" "-a" "6bc37e9d65ad6fcb0e7ad5d3d1e433753e342cdd64ed1b3455edc742ec056e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6bc37e9d65ad6fcb0e7ad5d3d1e433753e342cdd64ed1b3455edc742ec056e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6bc37e9d65ad6fcb0e7ad5d3d1e433753e342cdd64ed1b3455edc742ec056e7f", kill_on_drop: false }`
[INFO] [stdout] 6bc37e9d65ad6fcb0e7ad5d3d1e433753e342cdd64ed1b3455edc742ec056e7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] adef8e62267d4122d3e1ed37035f5d4814587166fc7b15c570b90013314f6caf
[INFO] running `Command { std: "docker" "start" "-a" "adef8e62267d4122d3e1ed37035f5d4814587166fc7b15c570b90013314f6caf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/vars.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let x: i32 = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "adef8e62267d4122d3e1ed37035f5d4814587166fc7b15c570b90013314f6caf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adef8e62267d4122d3e1ed37035f5d4814587166fc7b15c570b90013314f6caf", kill_on_drop: false }`
[INFO] [stdout] adef8e62267d4122d3e1ed37035f5d4814587166fc7b15c570b90013314f6caf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1631d70fd4dc30874f6fbe2323129f901942cfd1971c62acc006c438c55003e8
[INFO] running `Command { std: "docker" "start" "-a" "1631d70fd4dc30874f6fbe2323129f901942cfd1971c62acc006c438c55003e8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling exercises v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/vars.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let x: i32 = 1;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.25s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/exercises-cfebb873c30c5702)
[INFO] running `Command { std: "docker" "inspect" "1631d70fd4dc30874f6fbe2323129f901942cfd1971c62acc006c438c55003e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1631d70fd4dc30874f6fbe2323129f901942cfd1971c62acc006c438c55003e8", kill_on_drop: false }`
[INFO] [stdout] 1631d70fd4dc30874f6fbe2323129f901942cfd1971c62acc006c438c55003e8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2498e6e031080e003a0ef7cc3123e35ea9d4d285bac260d76ff3cadf506730e4
[INFO] running `Command { std: "docker" "start" "-a" "2498e6e031080e003a0ef7cc3123e35ea9d4d285bac260d76ff3cadf506730e4", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stdout] 
[INFO] [stderr]   --> src/vars.rs:29:9
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let x: i32 = 1;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `exercises` (bin "exercises" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/exercises-cfebb873c30c5702)
[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" "2498e6e031080e003a0ef7cc3123e35ea9d4d285bac260d76ff3cadf506730e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2498e6e031080e003a0ef7cc3123e35ea9d4d285bac260d76ff3cadf506730e4", kill_on_drop: false }`
[INFO] [stdout] 2498e6e031080e003a0ef7cc3123e35ea9d4d285bac260d76ff3cadf506730e4