[INFO] cloning repository https://github.com/yoshiioko/LearningRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yoshiioko/LearningRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyoshiioko%2FLearningRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyoshiioko%2FLearningRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e349f2ae3bf2f1117833125afa55c0e25e32016a
[INFO] testing yoshiioko/LearningRust against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyoshiioko%2FLearningRust" "/workspace/builds/worker-40/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-40/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yoshiioko/LearningRust on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/yoshiioko/LearningRust
[INFO] finished tweaking git repo https://github.com/yoshiioko/LearningRust
[INFO] tweaked toml for git repo https://github.com/yoshiioko/LearningRust written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] crate git repo https://github.com/yoshiioko/LearningRust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] eb3ff084af15fa679465cf4c30e82659cb220cd3dfb2de8256cd9b59ffe97e7f
[INFO] running `Command { std: "docker" "start" "-a" "eb3ff084af15fa679465cf4c30e82659cb220cd3dfb2de8256cd9b59ffe97e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb3ff084af15fa679465cf4c30e82659cb220cd3dfb2de8256cd9b59ffe97e7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb3ff084af15fa679465cf4c30e82659cb220cd3dfb2de8256cd9b59ffe97e7f", kill_on_drop: false }`
[INFO] [stdout] eb3ff084af15fa679465cf4c30e82659cb220cd3dfb2de8256cd9b59ffe97e7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e6a89dd730e2c5cd90059a6363b72ef835cd2990a5b96be5ce1692510ed3ad9
[INFO] running `Command { std: "docker" "start" "-a" "2e6a89dd730e2c5cd90059a6363b72ef835cd2990a5b96be5ce1692510ed3ad9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `a` is assigned to, but never used
[INFO] [stdout]  --> src/bin/3_variable_bindings.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a; // declaration w/ no data type
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_a` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]  --> src/bin/3_variable_bindings.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     a = 5;
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `b` is assigned to, but never used
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let b: i8; // declaration w/ data type
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_b` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     b = 5;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let t = true;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let f: bool = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `z` is assigned to, but never used
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut z = 5;
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_z` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `z` is never read
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     z = 6;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `N`
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     const N: i32 = 5;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static is never used: `M`
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     static M: i32 = 5;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.20s
[INFO] running `Command { std: "docker" "inspect" "2e6a89dd730e2c5cd90059a6363b72ef835cd2990a5b96be5ce1692510ed3ad9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e6a89dd730e2c5cd90059a6363b72ef835cd2990a5b96be5ce1692510ed3ad9", kill_on_drop: false }`
[INFO] [stdout] 2e6a89dd730e2c5cd90059a6363b72ef835cd2990a5b96be5ce1692510ed3ad9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0cdfeac08b0144e102a65b73801e2c89b729b57e0961d11ec647dc6328f302c2
[INFO] running `Command { std: "docker" "start" "-a" "0cdfeac08b0144e102a65b73801e2c89b729b57e0961d11ec647dc6328f302c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `a` is assigned to, but never used
[INFO] [stdout]  --> src/bin/3_variable_bindings.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a; // declaration w/ no data type
[INFO] [stdout]   |         ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]   = note: consider using `_a` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `a` is never read
[INFO] [stdout]  --> src/bin/3_variable_bindings.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     a = 5;
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `b` is assigned to, but never used
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let b: i8; // declaration w/ data type
[INFO] [stdout]    |         ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_b` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `b` is never read
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     b = 5;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let t = true;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let f: bool = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `z` is assigned to, but never used
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:18:13
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut z = 5;
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_z` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `z` is never read
[INFO] [stdout]   --> src/bin/3_variable_bindings.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     z = 6;
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "0cdfeac08b0144e102a65b73801e2c89b729b57e0961d11ec647dc6328f302c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0cdfeac08b0144e102a65b73801e2c89b729b57e0961d11ec647dc6328f302c2", kill_on_drop: false }`
[INFO] [stdout] 0cdfeac08b0144e102a65b73801e2c89b729b57e0961d11ec647dc6328f302c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] efc1a2b9b4eb601e599d68307fd5f44f5d427d04417ffdc21ef4d20615034132
[INFO] running `Command { std: "docker" "start" "-a" "efc1a2b9b4eb601e599d68307fd5f44f5d427d04417ffdc21ef4d20615034132", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: variable `a` is assigned to, but never used
[INFO] [stderr]  --> src/bin/3_variable_bindings.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let a; // declaration w/ no data type
[INFO] [stderr]   |         ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr]   = note: consider using `_a` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `a` is never read
[INFO] [stderr]  --> src/bin/3_variable_bindings.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     a = 5;
[INFO] [stderr]   |     ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable `b` is assigned to, but never used
[INFO] [stderr]   --> src/bin/3_variable_bindings.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let b: i8; // declaration w/ data type
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_b` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `b` is never read
[INFO] [stderr]   --> src/bin/3_variable_bindings.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     b = 5;
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/bin/3_variable_bindings.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let t = true;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/bin/3_variable_bindings.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let f: bool = false;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `z` is assigned to, but never used
[INFO] [stderr]   --> src/bin/3_variable_bindings.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut z = 5;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_z` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `z` is never read
[INFO] [stderr]   --> src/bin/3_variable_bindings.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     z = 6;
[INFO] [stderr]    |     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: `learning-rust` (bin "3_variable_bindings" test) generated 8 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.44s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/1_hello_world-af3768e2e6ccab61)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/2_comments-015463affcf89519)
[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] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/3_variable_bindings-1e6034131fc0270a)
[INFO] [stdout] test tests::test_hello ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[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" "efc1a2b9b4eb601e599d68307fd5f44f5d427d04417ffdc21ef4d20615034132", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efc1a2b9b4eb601e599d68307fd5f44f5d427d04417ffdc21ef4d20615034132", kill_on_drop: false }`
[INFO] [stdout] efc1a2b9b4eb601e599d68307fd5f44f5d427d04417ffdc21ef4d20615034132