[INFO] fetching crate pj 1.0.0...
[INFO] testing pj-1.0.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate pj 1.0.0 into /workspace/builds/worker-72/source
[INFO] validating manifest of crates.io crate pj 1.0.0 on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pj 1.0.0
[INFO] finished tweaking crates.io crate pj 1.0.0
[INFO] tweaked toml for crates.io crate pj 1.0.0 written to /workspace/builds/worker-72/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossterm_cursor v0.1.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.9.0
[INFO] [stderr]   Downloaded cassowary v0.3.0
[INFO] [stderr]   Downloaded crossterm_screen v0.1.0
[INFO] [stderr]   Downloaded crossterm_utils v0.1.0
[INFO] [stderr]   Downloaded crossterm_winapi v0.1.5
[INFO] [stderr]   Downloaded crossterm_terminal v0.1.0
[INFO] [stderr]   Downloaded termios v0.3.3
[INFO] [stderr]   Downloaded crossterm_style v0.1.0
[INFO] [stderr]   Downloaded crossterm v0.6.0
[INFO] [stderr]   Downloaded crossterm_input v0.1.0
[INFO] [stderr]   Downloaded tui v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f09fc0b5db3a3ad1b2d25ab0f16087e716e82435cdaf6b5b9acce2f5e52a907c
[INFO] running `Command { std: "docker" "start" "-a" "f09fc0b5db3a3ad1b2d25ab0f16087e716e82435cdaf6b5b9acce2f5e52a907c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f09fc0b5db3a3ad1b2d25ab0f16087e716e82435cdaf6b5b9acce2f5e52a907c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f09fc0b5db3a3ad1b2d25ab0f16087e716e82435cdaf6b5b9acce2f5e52a907c", kill_on_drop: false }`
[INFO] [stdout] f09fc0b5db3a3ad1b2d25ab0f16087e716e82435cdaf6b5b9acce2f5e52a907c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53539d770326859a5acfd09ebc440f9aa6a1cb67729b56372eb253de22315492
[INFO] running `Command { std: "docker" "start" "-a" "53539d770326859a5acfd09ebc440f9aa6a1cb67729b56372eb253de22315492", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling cassowary v0.3.0
[INFO] [stderr]    Compiling termios v0.3.3
[INFO] [stderr]    Compiling crossterm_utils v0.1.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling crossterm_cursor v0.1.0
[INFO] [stderr]    Compiling crossterm_screen v0.1.0
[INFO] [stderr]    Compiling crossterm_input v0.1.0
[INFO] [stderr]    Compiling crossterm_style v0.1.0
[INFO] [stderr]    Compiling crossterm_terminal v0.1.0
[INFO] [stderr]    Compiling crossterm v0.6.0
[INFO] [stderr]    Compiling tui v0.4.0
[INFO] [stderr]    Compiling serde_json v1.0.79
[INFO] [stderr]    Compiling pj v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/main.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         &keys.push(key.to_string());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = &keys.push(key.to_string());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.86s
[INFO] running `Command { std: "docker" "inspect" "53539d770326859a5acfd09ebc440f9aa6a1cb67729b56372eb253de22315492", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53539d770326859a5acfd09ebc440f9aa6a1cb67729b56372eb253de22315492", kill_on_drop: false }`
[INFO] [stdout] 53539d770326859a5acfd09ebc440f9aa6a1cb67729b56372eb253de22315492
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f926b06a51212036949c194a72b68e923fd52dcefaf6ded14c765dd046c5c5e1
[INFO] running `Command { std: "docker" "start" "-a" "f926b06a51212036949c194a72b68e923fd52dcefaf6ded14c765dd046c5c5e1", kill_on_drop: false }`
[INFO] [stderr]    Compiling pj v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/main.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |         &keys.push(key.to_string());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 58 |         let _ = &keys.push(key.to_string());
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.66s
[INFO] running `Command { std: "docker" "inspect" "f926b06a51212036949c194a72b68e923fd52dcefaf6ded14c765dd046c5c5e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f926b06a51212036949c194a72b68e923fd52dcefaf6ded14c765dd046c5c5e1", kill_on_drop: false }`
[INFO] [stdout] f926b06a51212036949c194a72b68e923fd52dcefaf6ded14c765dd046c5c5e1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-72/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 86584c7f843d6555b9855b49303ccab9c5e72156041a2873c7ab88d35c2cdeb3
[INFO] running `Command { std: "docker" "start" "-a" "86584c7f843d6555b9855b49303ccab9c5e72156041a2873c7ab88d35c2cdeb3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] 
[INFO] [stderr]   --> src/main.rs:58:9
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 58 |         &keys.push(key.to_string());
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let _ = &keys.push(key.to_string());
[INFO] [stderr]    |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `pj` (bin "pj" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/pj-508c22257e055f8b)
[INFO] running `Command { std: "docker" "inspect" "86584c7f843d6555b9855b49303ccab9c5e72156041a2873c7ab88d35c2cdeb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86584c7f843d6555b9855b49303ccab9c5e72156041a2873c7ab88d35c2cdeb3", kill_on_drop: false }`
[INFO] [stdout] 86584c7f843d6555b9855b49303ccab9c5e72156041a2873c7ab88d35c2cdeb3