[INFO] fetching crate rudac 0.8.3...
[INFO] building rudac-0.8.3 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate rudac 0.8.3 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate rudac 0.8.3
[INFO] finished tweaking crates.io crate rudac 0.8.3
[INFO] tweaked toml for crates.io crate rudac 0.8.3 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rudac 0.8.3 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 76ea820a0378deb8e7ccaa6938870b8195fb1fce5394c6ff8e37d50d87f0eeed
[INFO] running `Command { std: "docker" "start" "-a" "76ea820a0378deb8e7ccaa6938870b8195fb1fce5394c6ff8e37d50d87f0eeed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "76ea820a0378deb8e7ccaa6938870b8195fb1fce5394c6ff8e37d50d87f0eeed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76ea820a0378deb8e7ccaa6938870b8195fb1fce5394c6ff8e37d50d87f0eeed", kill_on_drop: false }`
[INFO] [stdout] 76ea820a0378deb8e7ccaa6938870b8195fb1fce5394c6ff8e37d50d87f0eeed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6feb65b6f9d9f8b1e0a9ac1209bc73a1fe754e1c80189bc4aabdda7d18576bcd
[INFO] running `Command { std: "docker" "start" "-a" "6feb65b6f9d9f8b1e0a9ac1209bc73a1fe754e1c80189bc4aabdda7d18576bcd", kill_on_drop: false }`
[INFO] [stderr]    Compiling rudac v0.8.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "6feb65b6f9d9f8b1e0a9ac1209bc73a1fe754e1c80189bc4aabdda7d18576bcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6feb65b6f9d9f8b1e0a9ac1209bc73a1fe754e1c80189bc4aabdda7d18576bcd", kill_on_drop: false }`
[INFO] [stdout] 6feb65b6f9d9f8b1e0a9ac1209bc73a1fe754e1c80189bc4aabdda7d18576bcd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f05f89eb0a8cc96bdeec7ee4361d6423cb807db8dce974052cdbf45e47b99bf7
[INFO] running `Command { std: "docker" "start" "-a" "f05f89eb0a8cc96bdeec7ee4361d6423cb807db8dce974052cdbf45e47b99bf7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rudac v0.8.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/queue/circular.rs:566:9
[INFO] [stdout]     |
[INFO] [stdout] 566 |         &vc[0];
[INFO] [stdout]     |         ^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 566 |         let _ = &vc[0];
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/queue/circular.rs:574:9
[INFO] [stdout]     |
[INFO] [stdout] 574 |         &vc[0];
[INFO] [stdout]     |         ^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 574 |         let _ = &vc[0];
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/queue/circular.rs:584:9
[INFO] [stdout]     |
[INFO] [stdout] 584 |         &vc[1];
[INFO] [stdout]     |         ^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 584 |         let _ = &vc[1];
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/queue/circular.rs:596:9
[INFO] [stdout]     |
[INFO] [stdout] 596 |         &vc[3];
[INFO] [stdout]     |         ^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 596 |         let _ = &vc[3];
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/queue/circular.rs:609:9
[INFO] [stdout]     |
[INFO] [stdout] 609 |         &vc[3];
[INFO] [stdout]     |         ^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 609 |         let _ = &vc[3];
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.19s
[INFO] running `Command { std: "docker" "inspect" "f05f89eb0a8cc96bdeec7ee4361d6423cb807db8dce974052cdbf45e47b99bf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f05f89eb0a8cc96bdeec7ee4361d6423cb807db8dce974052cdbf45e47b99bf7", kill_on_drop: false }`
[INFO] [stdout] f05f89eb0a8cc96bdeec7ee4361d6423cb807db8dce974052cdbf45e47b99bf7