[INFO] fetching crate steganography 1.0.2...
[INFO] checking steganography-1.0.2 against master#339e19697a39a78f4d669c217b7d21109215de41 for pr-81213
[INFO] extracting crate steganography 1.0.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate steganography 1.0.2 on toolchain 339e19697a39a78f4d669c217b7d21109215de41
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate steganography 1.0.2
[INFO] finished tweaking crates.io crate steganography 1.0.2
[INFO] tweaked toml for crates.io crate steganography 1.0.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82e7f1f93e2b9c4831b1c6351d050fe703ef137dbf8291ed708a2da9daab88f2
[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" "82e7f1f93e2b9c4831b1c6351d050fe703ef137dbf8291ed708a2da9daab88f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82e7f1f93e2b9c4831b1c6351d050fe703ef137dbf8291ed708a2da9daab88f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82e7f1f93e2b9c4831b1c6351d050fe703ef137dbf8291ed708a2da9daab88f2", kill_on_drop: false }`
[INFO] [stdout] 82e7f1f93e2b9c4831b1c6351d050fe703ef137dbf8291ed708a2da9daab88f2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+339e19697a39a78f4d669c217b7d21109215de41" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0907572911b3b84adc776b16fa9e160c08a165e3897e8b83dccddb91dcc1a14d
[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" "0907572911b3b84adc776b16fa9e160c08a165e3897e8b83dccddb91dcc1a14d", kill_on_drop: false }`
[INFO] [stderr]    Compiling const_fn v0.4.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking png v0.14.1
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking tiff v0.2.2
[INFO] [stderr]     Checking image v0.21.3
[INFO] [stderr]     Checking steganography v1.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `dec_vec`
[INFO] [stdout]   --> benches/bench.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let dec_vec = dec.decode_alpha();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dec_vec`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `dec_vec`
[INFO] [stdout]   --> benches/bench.rs:49:13
[INFO] [stdout]    |
[INFO] [stdout] 49 |         let dec_vec = dec.decode_image();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dec_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.74s
[INFO] running `Command { std: "docker" "inspect" "0907572911b3b84adc776b16fa9e160c08a165e3897e8b83dccddb91dcc1a14d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0907572911b3b84adc776b16fa9e160c08a165e3897e8b83dccddb91dcc1a14d", kill_on_drop: false }`
[INFO] [stdout] 0907572911b3b84adc776b16fa9e160c08a165e3897e8b83dccddb91dcc1a14d