[INFO] cloning repository https://github.com/atkinchris/cpu-stats-logger
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/atkinchris/cpu-stats-logger" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fatkinchris%2Fcpu-stats-logger", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fatkinchris%2Fcpu-stats-logger'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a129c9fc55fcb9bd1b412af0a3c15c2215946a5d
[INFO] checking atkinchris/cpu-stats-logger against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fatkinchris%2Fcpu-stats-logger" "/workspace/builds/worker-21/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-21/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/atkinchris/cpu-stats-logger on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/atkinchris/cpu-stats-logger
[INFO] finished tweaking git repo https://github.com/atkinchris/cpu-stats-logger
[INFO] tweaked toml for git repo https://github.com/atkinchris/cpu-stats-logger written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate git repo https://github.com/atkinchris/cpu-stats-logger already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "ef9a0beff0426c718276f2c78b7b29f867d0b09648a55e8d30ca1f33047ee9ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef9a0beff0426c718276f2c78b7b29f867d0b09648a55e8d30ca1f33047ee9ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef9a0beff0426c718276f2c78b7b29f867d0b09648a55e8d30ca1f33047ee9ef", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e034585ea3ee430bdd34ce81f5a4be3dc21438a49d4e489f3a29b6e5452a0322
[INFO] running `Command { std: "docker" "start" "-a" "e034585ea3ee430bdd34ce81f5a4be3dc21438a49d4e489f3a29b6e5452a0322", kill_on_drop: false }`
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[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stats.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &sys.refresh_all();
[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] 80 |     let _ = &sys.refresh_all();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stats.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &sys.refresh_all();
[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] 80 |     let _ = &sys.refresh_all();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stats.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &sys.refresh_all();
[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] 80 |     let _ = &sys.refresh_all();
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/stats.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     &sys.refresh_all();
[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] 80 |     let _ = &sys.refresh_all();
[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 32.12s
[INFO] running `Command { std: "docker" "inspect" "e034585ea3ee430bdd34ce81f5a4be3dc21438a49d4e489f3a29b6e5452a0322", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e034585ea3ee430bdd34ce81f5a4be3dc21438a49d4e489f3a29b6e5452a0322", kill_on_drop: false }`
[INFO] [stdout] e034585ea3ee430bdd34ce81f5a4be3dc21438a49d4e489f3a29b6e5452a0322