[INFO] cloning repository https://github.com/Playing-with-Rust/simple-card-draft
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Playing-with-Rust/simple-card-draft" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlaying-with-Rust%2Fsimple-card-draft", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlaying-with-Rust%2Fsimple-card-draft'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5011bd14436e5915eec1d5253a357d441c7b1bf8
[INFO] checking Playing-with-Rust/simple-card-draft against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPlaying-with-Rust%2Fsimple-card-draft" "/workspace/builds/worker-119/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-119/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Playing-with-Rust/simple-card-draft on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Playing-with-Rust/simple-card-draft
[INFO] finished tweaking git repo https://github.com/Playing-with-Rust/simple-card-draft
[INFO] tweaked toml for git repo https://github.com/Playing-with-Rust/simple-card-draft written to /workspace/builds/worker-119/source/Cargo.toml
[INFO] crate git repo https://github.com/Playing-with-Rust/simple-card-draft already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2662e6b48d608cafc4e2661b0d6c791ba70da2f4a74db3942a9fdafad874c462
[INFO] running `Command { std: "docker" "start" "-a" "2662e6b48d608cafc4e2661b0d6c791ba70da2f4a74db3942a9fdafad874c462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2662e6b48d608cafc4e2661b0d6c791ba70da2f4a74db3942a9fdafad874c462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2662e6b48d608cafc4e2661b0d6c791ba70da2f4a74db3942a9fdafad874c462", kill_on_drop: false }`
[INFO] [stdout] 2662e6b48d608cafc4e2661b0d6c791ba70da2f4a74db3942a9fdafad874c462
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-119/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e492165725bd110fdf28f1e65209e62bcff2c8e4c8860b65d26d9e4c1e51c60
[INFO] running `Command { std: "docker" "start" "-a" "6e492165725bd110fdf28f1e65209e62bcff2c8e4c8860b65d26d9e4c1e51c60", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]    Compiling rand_derive v0.5.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking lipsum v0.7.0
[INFO] [stderr]     Checking simple-card-draft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/card.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |         &adjective.pop();
[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] 102 |         let _ = &adjective.pop();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/card.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         &subjective.pop();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let _ = &subjective.pop();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/card.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |         &adjective.pop();
[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] 102 |         let _ = &adjective.pop();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/card.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         &subjective.pop();
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 103 |         let _ = &subjective.pop();
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.12s
[INFO] running `Command { std: "docker" "inspect" "6e492165725bd110fdf28f1e65209e62bcff2c8e4c8860b65d26d9e4c1e51c60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e492165725bd110fdf28f1e65209e62bcff2c8e4c8860b65d26d9e4c1e51c60", kill_on_drop: false }`
[INFO] [stdout] 6e492165725bd110fdf28f1e65209e62bcff2c8e4c8860b65d26d9e4c1e51c60