[INFO] cloning repository https://github.com/Ragnyll/rust_variables
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Ragnyll/rust_variables" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRagnyll%2Frust_variables", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRagnyll%2Frust_variables'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b02e8595809a2dca3ba21af362c3cbb664c264de
[INFO] testing Ragnyll/rust_variables against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRagnyll%2Frust_variables" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Ragnyll/rust_variables on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Ragnyll/rust_variables
[INFO] finished tweaking git repo https://github.com/Ragnyll/rust_variables
[INFO] tweaked toml for git repo https://github.com/Ragnyll/rust_variables written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Ragnyll/rust_variables already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6fbfc632a2a3f01e1a13c7eac91caa0832ba1420ba8ac81112ff3b9d1bd04c5
[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" "c6fbfc632a2a3f01e1a13c7eac91caa0832ba1420ba8ac81112ff3b9d1bd04c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6fbfc632a2a3f01e1a13c7eac91caa0832ba1420ba8ac81112ff3b9d1bd04c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6fbfc632a2a3f01e1a13c7eac91caa0832ba1420ba8ac81112ff3b9d1bd04c5", kill_on_drop: false }`
[INFO] [stdout] c6fbfc632a2a3f01e1a13c7eac91caa0832ba1420ba8ac81112ff3b9d1bd04c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bdaee4da1f56488f2511c4ad80947f3764e4329322d1c9d8b502050dbd63f33f
[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" "bdaee4da1f56488f2511c4ad80947f3764e4329322d1c9d8b502050dbd63f33f", kill_on_drop: false }`
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `difference`
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let difference = 95.5 - 4.3;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `product`
[INFO] [stdout]   --> src/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let product = 4 * 30;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quotient`
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let quotient = 56.7 / 32.2;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `remainder`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let remainder = 43 % 5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remainder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let t = true; // without explicit type annotation
[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/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let f: bool = false; // with explicit type annotation
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:59:10
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:59:16
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let first = months[0];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "bdaee4da1f56488f2511c4ad80947f3764e4329322d1c9d8b502050dbd63f33f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bdaee4da1f56488f2511c4ad80947f3764e4329322d1c9d8b502050dbd63f33f", kill_on_drop: false }`
[INFO] [stdout] bdaee4da1f56488f2511c4ad80947f3764e4329322d1c9d8b502050dbd63f33f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f56b832d0d4e013f4461342711df20e8dc4629778055f51b1c5fc7e0bf63f60a
[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" "f56b832d0d4e013f4461342711df20e8dc4629778055f51b1c5fc7e0bf63f60a", kill_on_drop: false }`
[INFO] [stderr]    Compiling variables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `difference`
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let difference = 95.5 - 4.3;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `product`
[INFO] [stdout]   --> src/main.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let product = 4 * 30;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quotient`
[INFO] [stdout]   --> src/main.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let quotient = 56.7 / 32.2;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `remainder`
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let remainder = 43 % 5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remainder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:53:9
[INFO] [stdout]    |
[INFO] [stdout] 53 |     let t = true; // without explicit type annotation
[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/main.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let f: bool = false; // with explicit type annotation
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:59:10
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (x, y, z) = tup;
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> src/main.rs:59:16
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (x, y, z) = tup;
[INFO] [stdout]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `first`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let first = months[0];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "f56b832d0d4e013f4461342711df20e8dc4629778055f51b1c5fc7e0bf63f60a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f56b832d0d4e013f4461342711df20e8dc4629778055f51b1c5fc7e0bf63f60a", kill_on_drop: false }`
[INFO] [stdout] f56b832d0d4e013f4461342711df20e8dc4629778055f51b1c5fc7e0bf63f60a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f03cf705b7829de66408c9dc1ef37e39e74d57f1bae73dcdc0f2aff634e7bafc
[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" "f03cf705b7829de66408c9dc1ef37e39e74d57f1bae73dcdc0f2aff634e7bafc", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `difference`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:41:9
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 41 |     let difference = 95.5 - 4.3;
[INFO] [stdout] 
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `product`
[INFO] [stderr]   --> src/main.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let product = 4 * 30;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `quotient`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let quotient = 56.7 / 32.2;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `remainder`
[INFO] [stderr]   --> src/main.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let remainder = 43 % 5;
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remainder`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let t = true; // without explicit type annotation
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/main.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let f: bool = false; // with explicit type annotation
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:59:10
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let (x, y, z) = tup;
[INFO] [stderr]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]   --> src/main.rs:59:16
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let (x, y, z) = tup;
[INFO] [stderr]    |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `first`
[INFO] [stderr]   --> src/main.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let first = months[0];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_first`
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/variables-33343a74fc99ae3b)
[INFO] running `Command { std: "docker" "inspect" "f03cf705b7829de66408c9dc1ef37e39e74d57f1bae73dcdc0f2aff634e7bafc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f03cf705b7829de66408c9dc1ef37e39e74d57f1bae73dcdc0f2aff634e7bafc", kill_on_drop: false }`
[INFO] [stdout] f03cf705b7829de66408c9dc1ef37e39e74d57f1bae73dcdc0f2aff634e7bafc