[INFO] fetching crate potlood 0.1.0...
[INFO] checking potlood-0.1.0 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate potlood 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate potlood 0.1.0
[INFO] finished tweaking crates.io crate potlood 0.1.0
[INFO] tweaked toml for crates.io crate potlood 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate potlood 0.1.0 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate potlood 0.1.0 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67e8de0e74e3403705c1c94d20b038abfaac0d32070e5dc55ae4f6f330d25a6f
[INFO] running `Command { std: "docker" "start" "-a" "67e8de0e74e3403705c1c94d20b038abfaac0d32070e5dc55ae4f6f330d25a6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67e8de0e74e3403705c1c94d20b038abfaac0d32070e5dc55ae4f6f330d25a6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67e8de0e74e3403705c1c94d20b038abfaac0d32070e5dc55ae4f6f330d25a6f", kill_on_drop: false }`
[INFO] [stdout] 67e8de0e74e3403705c1c94d20b038abfaac0d32070e5dc55ae4f6f330d25a6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid" "-e" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d806242692a75769697e8da2ee5098b8607943e8b46bf5d976a8dcd0f1c1a30b
[INFO] running `Command { std: "docker" "start" "-a" "d806242692a75769697e8da2ee5098b8607943e8b46bf5d976a8dcd0f1c1a30b", kill_on_drop: false }`
[INFO] [stderr]     Checking potlood v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/shapes.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     paper.rect(width / 4, height / 4, 100, 200, Pixel::color(Color::Red));
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let _ = paper.rect(width / 4, height / 4, 100, 200, Pixel::color(Color::Red));
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> examples/shapes.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | /     paper.circle(
[INFO] [stdout] 21 | |         3 * width / 4,
[INFO] [stdout] 22 | |         3 * height / 4,
[INFO] [stdout] 23 | |         100,
[INFO] [stdout] 24 | |         Pixel::color(Color::Green),
[INFO] [stdout] 25 | |     );
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let _ = paper.circle(
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "d806242692a75769697e8da2ee5098b8607943e8b46bf5d976a8dcd0f1c1a30b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d806242692a75769697e8da2ee5098b8607943e8b46bf5d976a8dcd0f1c1a30b", kill_on_drop: false }`
[INFO] [stdout] d806242692a75769697e8da2ee5098b8607943e8b46bf5d976a8dcd0f1c1a30b