[INFO] fetching crate truetree 0.1.3...
[INFO] checking truetree-0.1.3 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate truetree 0.1.3 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate truetree 0.1.3
[INFO] finished tweaking crates.io crate truetree 0.1.3
[INFO] tweaked toml for crates.io crate truetree 0.1.3 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate truetree 0.1.3 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3aea6c8e322ead1cfa2562ebeea93054ee20f2a2c9a572ec613e5f96b072bf5
[INFO] running `Command { std: "docker" "start" "-a" "e3aea6c8e322ead1cfa2562ebeea93054ee20f2a2c9a572ec613e5f96b072bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3aea6c8e322ead1cfa2562ebeea93054ee20f2a2c9a572ec613e5f96b072bf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3aea6c8e322ead1cfa2562ebeea93054ee20f2a2c9a572ec613e5f96b072bf5", kill_on_drop: false }`
[INFO] [stdout] e3aea6c8e322ead1cfa2562ebeea93054ee20f2a2c9a572ec613e5f96b072bf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f453fcf486f4f75056734c5810bf00816f6a2a43615381efd5e8c19dda7de90b
[INFO] running `Command { std: "docker" "start" "-a" "f453fcf486f4f75056734c5810bf00816f6a2a43615381efd5e8c19dda7de90b", kill_on_drop: false }`
[INFO] [stderr]     Checking truetree v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |             drop(value);
[INFO] [stdout]     |             ^^^^^-----^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `u64`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 203 -             drop(value);
[INFO] [stdout] 203 +             let _ = value;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]    --> src/lib.rs:236:13
[INFO] [stdout]     |
[INFO] [stdout] 236 |             drop(payload);
[INFO] [stdout]     |             ^^^^^-------^
[INFO] [stdout]     |                  |
[INFO] [stdout]     |                  argument has type `u64`
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]     |
[INFO] [stdout] 236 -             drop(payload);
[INFO] [stdout] 236 +             let _ = payload;
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "f453fcf486f4f75056734c5810bf00816f6a2a43615381efd5e8c19dda7de90b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f453fcf486f4f75056734c5810bf00816f6a2a43615381efd5e8c19dda7de90b", kill_on_drop: false }`
[INFO] [stdout] f453fcf486f4f75056734c5810bf00816f6a2a43615381efd5e8c19dda7de90b